---
title: "Google Vertex"
id: integrations-google-vertex
description: "Google Vertex integration for Haystack"
slug: "/integrations-google-vertex"
---

<a id="haystack_integrations.components.generators.google_vertex.gemini"></a>

## Module haystack\_integrations.components.generators.google\_vertex.gemini

<a id="haystack_integrations.components.generators.google_vertex.gemini.VertexAIGeminiGenerator"></a>

### VertexAIGeminiGenerator

`VertexAIGeminiGenerator` enables text generation using Google Gemini models.

Usage example:
```python
from haystack_integrations.components.generators.google_vertex import VertexAIGeminiGenerator


gemini = VertexAIGeminiGenerator()
result = gemini.run(parts = ["What is the most interesting thing you know?"])
for answer in result["replies"]:
    print(answer)

>>> 1. **The Origin of Life:** How and where did life begin? The answers to this ...
>>> 2. **The Unseen Universe:** The vast majority of the universe is ...
>>> 3. **Quantum Entanglement:** This eerie phenomenon in quantum mechanics allows ...
>>> 4. **Time Dilation:** Einstein's theory of relativity revealed that time can ...
>>> 5. **The Fermi Paradox:** Despite the vastness of the universe and the ...
>>> 6. **Biological Evolution:** The idea that life evolves over time through natural ...
>>> 7. **Neuroplasticity:** The brain's ability to adapt and change throughout life, ...
>>> 8. **The Goldilocks Zone:** The concept of the habitable zone, or the Goldilocks zone, ...
>>> 9. **String Theory:** This theoretical framework in physics aims to unify all ...
>>> 10. **Consciousness:** The nature of human consciousness and how it arises ...
```

<a id="haystack_integrations.components.generators.google_vertex.gemini.VertexAIGeminiGenerator.__init__"></a>

#### VertexAIGeminiGenerator.\_\_init\_\_

```python
def __init__(*,
             model: str = "gemini-2.0-flash",
             project_id: Optional[str] = None,
             location: Optional[str] = None,
             generation_config: Optional[Union[GenerationConfig,
                                               Dict[str, Any]]] = None,
             safety_settings: Optional[Dict[HarmCategory,
                                            HarmBlockThreshold]] = None,
             system_instruction: Optional[Union[str, ByteStream, Part]] = None,
             streaming_callback: Optional[Callable[[StreamingChunk],
                                                   None]] = None)
```

Multi-modal generator using Gemini model via Google Vertex AI.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

**Arguments**:

- `project_id`: ID of the GCP project to use. By default, it is set during Google Cloud authentication.
- `model`: Name of the model to use. For available models, see https://cloud.google.com/vertex-ai/generative-ai/docs/learn/models.
- `location`: The default location to use when making API calls, if not set uses us-central-1.
- `generation_config`: The generation config to use.
Can either be a [`GenerationConfig`](https://cloud.google.com/python/docs/reference/aiplatform/latest/vertexai.generative_models.GenerationConfig)
object or a dictionary of parameters.
Accepted fields are:
    - temperature
    - top_p
    - top_k
    - candidate_count
    - max_output_tokens
    - stop_sequences
- `safety_settings`: The safety settings to use. See the documentation
for [HarmBlockThreshold](https://cloud.google.com/python/docs/reference/aiplatform/latest/vertexai.generative_models.HarmBlockThreshold)
and [HarmCategory](https://cloud.google.com/python/docs/reference/aiplatform/latest/vertexai.generative_models.HarmCategory)
for more details.
- `system_instruction`: Default system instruction to use for generating content.
- `streaming_callback`: A callback function that is called when a new token is received from the stream.
The callback function accepts StreamingChunk as an argument.

<a id="haystack_integrations.components.generators.google_vertex.gemini.VertexAIGeminiGenerator.to_dict"></a>

#### VertexAIGeminiGenerator.to\_dict

```python
def to_dict() -> Dict[str, Any]
```

Serializes the component to a dictionary.

**Returns**:

Dictionary with serialized data.

<a id="haystack_integrations.components.generators.google_vertex.gemini.VertexAIGeminiGenerator.from_dict"></a>

#### VertexAIGeminiGenerator.from\_dict

```python
@classmethod
def from_dict(cls, data: Dict[str, Any]) -> "VertexAIGeminiGenerator"
```

Deserializes the component from a dictionary.

**Arguments**:

- `data`: Dictionary to deserialize from.

**Returns**:

Deserialized component.

<a id="haystack_integrations.components.generators.google_vertex.gemini.VertexAIGeminiGenerator.run"></a>

#### VertexAIGeminiGenerator.run

```python
@component.output_types(replies=List[str])
def run(parts: Variadic[Union[str, ByteStream, Part]],
        streaming_callback: Optional[Callable[[StreamingChunk], None]] = None)
```

Generates content using the Gemini model.

**Arguments**:

- `parts`: Prompt for the model.
- `streaming_callback`: A callback function that is called when a new token is received from the stream.

**Returns**:

A dictionary with the following keys:
- `replies`: A list of generated content.

<a id="haystack_integrations.components.generators.google_vertex.captioner"></a>

## Module haystack\_integrations.components.generators.google\_vertex.captioner

<a id="haystack_integrations.components.generators.google_vertex.captioner.VertexAIImageCaptioner"></a>

### VertexAIImageCaptioner

`VertexAIImageCaptioner` enables text generation using Google Vertex AI imagetext generative model.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

Usage example:
```python
import requests

from haystack.dataclasses.byte_stream import ByteStream
from haystack_integrations.components.generators.google_vertex import VertexAIImageCaptioner

captioner = VertexAIImageCaptioner()

image = ByteStream(
    data=requests.get(
        "https://raw.githubusercontent.com/deepset-ai/haystack-core-integrations/main/integrations/google_vertex/example_assets/robot1.jpg"
    ).content
)
result = captioner.run(image=image)

for caption in result["captions"]:
    print(caption)

>>> two gold robots are standing next to each other in the desert
```

<a id="haystack_integrations.components.generators.google_vertex.captioner.VertexAIImageCaptioner.__init__"></a>

#### VertexAIImageCaptioner.\_\_init\_\_

```python
def __init__(*,
             model: str = "imagetext",
             project_id: Optional[str] = None,
             location: Optional[str] = None,
             **kwargs)
```

Generate image captions using a Google Vertex AI model.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

**Arguments**:

- `project_id`: ID of the GCP project to use. By default, it is set during Google Cloud authentication.
- `model`: Name of the model to use.
- `location`: The default location to use when making API calls, if not set uses us-central-1.
Defaults to None.
- `kwargs`: Additional keyword arguments to pass to the model.
For a list of supported arguments see the `ImageTextModel.get_captions()` documentation.

<a id="haystack_integrations.components.generators.google_vertex.captioner.VertexAIImageCaptioner.to_dict"></a>

#### VertexAIImageCaptioner.to\_dict

```python
def to_dict() -> Dict[str, Any]
```

Serializes the component to a dictionary.

**Returns**:

Dictionary with serialized data.

<a id="haystack_integrations.components.generators.google_vertex.captioner.VertexAIImageCaptioner.from_dict"></a>

#### VertexAIImageCaptioner.from\_dict

```python
@classmethod
def from_dict(cls, data: Dict[str, Any]) -> "VertexAIImageCaptioner"
```

Deserializes the component from a dictionary.

**Arguments**:

- `data`: Dictionary to deserialize from.

**Returns**:

Deserialized component.

<a id="haystack_integrations.components.generators.google_vertex.captioner.VertexAIImageCaptioner.run"></a>

#### VertexAIImageCaptioner.run

```python
@component.output_types(captions=List[str])
def run(image: ByteStream)
```

Prompts the model to generate captions for the given image.

**Arguments**:

- `image`: The image to generate captions for.

**Returns**:

A dictionary with the following keys:
- `captions`: A list of captions generated by the model.

<a id="haystack_integrations.components.generators.google_vertex.code_generator"></a>

## Module haystack\_integrations.components.generators.google\_vertex.code\_generator

<a id="haystack_integrations.components.generators.google_vertex.code_generator.VertexAICodeGenerator"></a>

### VertexAICodeGenerator

This component enables code generation using Google Vertex AI generative model.

`VertexAICodeGenerator` supports `code-bison`, `code-bison-32k`, and `code-gecko`.

Usage example:
```python
    from haystack_integrations.components.generators.google_vertex import VertexAICodeGenerator

    generator = VertexAICodeGenerator()

    result = generator.run(prefix="def to_json(data):")

    for answer in result["replies"]:
        print(answer)

    >>> ```python
    >>> import json
    >>>
    >>> def to_json(data):
    >>>   """Converts a Python object to a JSON string.
    >>>
    >>>   Args:
    >>>     data: The Python object to convert.
    >>>
    >>>   Returns:
    >>>     A JSON string representing the Python object.
    >>>   """
    >>>
    >>>   return json.dumps(data)
    >>> ```
```

<a id="haystack_integrations.components.generators.google_vertex.code_generator.VertexAICodeGenerator.__init__"></a>

#### VertexAICodeGenerator.\_\_init\_\_

```python
def __init__(*,
             model: str = "code-bison",
             project_id: Optional[str] = None,
             location: Optional[str] = None,
             **kwargs)
```

Generate code using a Google Vertex AI model.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

**Arguments**:

- `project_id`: ID of the GCP project to use. By default, it is set during Google Cloud authentication.
- `model`: Name of the model to use.
- `location`: The default location to use when making API calls, if not set uses us-central-1.
- `kwargs`: Additional keyword arguments to pass to the model.
For a list of supported arguments see the `TextGenerationModel.predict()` documentation.

<a id="haystack_integrations.components.generators.google_vertex.code_generator.VertexAICodeGenerator.to_dict"></a>

#### VertexAICodeGenerator.to\_dict

```python
def to_dict() -> Dict[str, Any]
```

Serializes the component to a dictionary.

**Returns**:

Dictionary with serialized data.

<a id="haystack_integrations.components.generators.google_vertex.code_generator.VertexAICodeGenerator.from_dict"></a>

#### VertexAICodeGenerator.from\_dict

```python
@classmethod
def from_dict(cls, data: Dict[str, Any]) -> "VertexAICodeGenerator"
```

Deserializes the component from a dictionary.

**Arguments**:

- `data`: Dictionary to deserialize from.

**Returns**:

Deserialized component.

<a id="haystack_integrations.components.generators.google_vertex.code_generator.VertexAICodeGenerator.run"></a>

#### VertexAICodeGenerator.run

```python
@component.output_types(replies=List[str])
def run(prefix: str, suffix: Optional[str] = None)
```

Generate code using a Google Vertex AI model.

**Arguments**:

- `prefix`: Code before the current point.
- `suffix`: Code after the current point.

**Returns**:

A dictionary with the following keys:
- `replies`: A list of generated code snippets.

<a id="haystack_integrations.components.generators.google_vertex.image_generator"></a>

## Module haystack\_integrations.components.generators.google\_vertex.image\_generator

<a id="haystack_integrations.components.generators.google_vertex.image_generator.VertexAIImageGenerator"></a>

### VertexAIImageGenerator

This component enables image generation using Google Vertex AI generative model.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

Usage example:
```python
from pathlib import Path

from haystack_integrations.components.generators.google_vertex import VertexAIImageGenerator

generator = VertexAIImageGenerator()
result = generator.run(prompt="Generate an image of a cute cat")
result["images"][0].to_file(Path("my_image.png"))
```

<a id="haystack_integrations.components.generators.google_vertex.image_generator.VertexAIImageGenerator.__init__"></a>

#### VertexAIImageGenerator.\_\_init\_\_

```python
def __init__(*,
             model: str = "imagegeneration",
             project_id: Optional[str] = None,
             location: Optional[str] = None,
             **kwargs)
```

Generates images using a Google Vertex AI model.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

**Arguments**:

- `project_id`: ID of the GCP project to use. By default, it is set during Google Cloud authentication.
- `model`: Name of the model to use.
- `location`: The default location to use when making API calls, if not set uses us-central-1.
- `kwargs`: Additional keyword arguments to pass to the model.
For a list of supported arguments see the `ImageGenerationModel.generate_images()` documentation.

<a id="haystack_integrations.components.generators.google_vertex.image_generator.VertexAIImageGenerator.to_dict"></a>

#### VertexAIImageGenerator.to\_dict

```python
def to_dict() -> Dict[str, Any]
```

Serializes the component to a dictionary.

**Returns**:

Dictionary with serialized data.

<a id="haystack_integrations.components.generators.google_vertex.image_generator.VertexAIImageGenerator.from_dict"></a>

#### VertexAIImageGenerator.from\_dict

```python
@classmethod
def from_dict(cls, data: Dict[str, Any]) -> "VertexAIImageGenerator"
```

Deserializes the component from a dictionary.

**Arguments**:

- `data`: Dictionary to deserialize from.

**Returns**:

Deserialized component.

<a id="haystack_integrations.components.generators.google_vertex.image_generator.VertexAIImageGenerator.run"></a>

#### VertexAIImageGenerator.run

```python
@component.output_types(images=List[ByteStream])
def run(prompt: str, negative_prompt: Optional[str] = None)
```

Produces images based on the given prompt.

**Arguments**:

- `prompt`: The prompt to generate images from.
- `negative_prompt`: A description of what you want to omit in
the generated images.

**Returns**:

A dictionary with the following keys:
- `images`: A list of ByteStream objects, each containing an image.

<a id="haystack_integrations.components.generators.google_vertex.question_answering"></a>

## Module haystack\_integrations.components.generators.google\_vertex.question\_answering

<a id="haystack_integrations.components.generators.google_vertex.question_answering.VertexAIImageQA"></a>

### VertexAIImageQA

This component enables text generation (image captioning) using Google Vertex AI generative models.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

Usage example:
```python
from haystack.dataclasses.byte_stream import ByteStream
from haystack_integrations.components.generators.google_vertex import VertexAIImageQA

qa = VertexAIImageQA()

image = ByteStream.from_file_path("dog.jpg")

res = qa.run(image=image, question="What color is this dog")

print(res["replies"][0])

>>> white
```

<a id="haystack_integrations.components.generators.google_vertex.question_answering.VertexAIImageQA.__init__"></a>

#### VertexAIImageQA.\_\_init\_\_

```python
def __init__(*,
             model: str = "imagetext",
             project_id: Optional[str] = None,
             location: Optional[str] = None,
             **kwargs)
```

Answers questions about an image using a Google Vertex AI model.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

**Arguments**:

- `project_id`: ID of the GCP project to use. By default, it is set during Google Cloud authentication.
- `model`: Name of the model to use.
- `location`: The default location to use when making API calls, if not set uses us-central-1.
- `kwargs`: Additional keyword arguments to pass to the model.
For a list of supported arguments see the `ImageTextModel.ask_question()` documentation.

<a id="haystack_integrations.components.generators.google_vertex.question_answering.VertexAIImageQA.to_dict"></a>

#### VertexAIImageQA.to\_dict

```python
def to_dict() -> Dict[str, Any]
```

Serializes the component to a dictionary.

**Returns**:

Dictionary with serialized data.

<a id="haystack_integrations.components.generators.google_vertex.question_answering.VertexAIImageQA.from_dict"></a>

#### VertexAIImageQA.from\_dict

```python
@classmethod
def from_dict(cls, data: Dict[str, Any]) -> "VertexAIImageQA"
```

Deserializes the component from a dictionary.

**Arguments**:

- `data`: Dictionary to deserialize from.

**Returns**:

Deserialized component.

<a id="haystack_integrations.components.generators.google_vertex.question_answering.VertexAIImageQA.run"></a>

#### VertexAIImageQA.run

```python
@component.output_types(replies=List[str])
def run(image: ByteStream, question: str)
```

Prompts model to answer a question about an image.

**Arguments**:

- `image`: The image to ask the question about.
- `question`: The question to ask.

**Returns**:

A dictionary with the following keys:
- `replies`: A list of answers to the question.

<a id="haystack_integrations.components.generators.google_vertex.text_generator"></a>

## Module haystack\_integrations.components.generators.google\_vertex.text\_generator

<a id="haystack_integrations.components.generators.google_vertex.text_generator.VertexAITextGenerator"></a>

### VertexAITextGenerator

This component enables text generation using Google Vertex AI generative models.

`VertexAITextGenerator` supports `text-bison`, `text-unicorn` and `text-bison-32k` models.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

Usage example:
```python
    from haystack_integrations.components.generators.google_vertex import VertexAITextGenerator

    generator = VertexAITextGenerator()
    res = generator.run("Tell me a good interview question for a software engineer.")

    print(res["replies"][0])

    >>> **Question:**
    >>> You are given a list of integers and a target sum.
    >>> Find all unique combinations of numbers in the list that add up to the target sum.
    >>>
    >>> **Example:**
    >>>
    >>> ```
    >>> Input: [1, 2, 3, 4, 5], target = 7
    >>> Output: [[1, 2, 4], [3, 4]]
    >>> ```
    >>>
    >>> **Follow-up:** What if the list contains duplicate numbers?
```

<a id="haystack_integrations.components.generators.google_vertex.text_generator.VertexAITextGenerator.__init__"></a>

#### VertexAITextGenerator.\_\_init\_\_

```python
def __init__(*,
             model: str = "text-bison",
             project_id: Optional[str] = None,
             location: Optional[str] = None,
             **kwargs)
```

Generate text using a Google Vertex AI model.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

**Arguments**:

- `project_id`: ID of the GCP project to use. By default, it is set during Google Cloud authentication.
- `model`: Name of the model to use.
- `location`: The default location to use when making API calls, if not set uses us-central-1.
- `kwargs`: Additional keyword arguments to pass to the model.
For a list of supported arguments see the `TextGenerationModel.predict()` documentation.

<a id="haystack_integrations.components.generators.google_vertex.text_generator.VertexAITextGenerator.to_dict"></a>

#### VertexAITextGenerator.to\_dict

```python
def to_dict() -> Dict[str, Any]
```

Serializes the component to a dictionary.

**Returns**:

Dictionary with serialized data.

<a id="haystack_integrations.components.generators.google_vertex.text_generator.VertexAITextGenerator.from_dict"></a>

#### VertexAITextGenerator.from\_dict

```python
@classmethod
def from_dict(cls, data: Dict[str, Any]) -> "VertexAITextGenerator"
```

Deserializes the component from a dictionary.

**Arguments**:

- `data`: Dictionary to deserialize from.

**Returns**:

Deserialized component.

<a id="haystack_integrations.components.generators.google_vertex.text_generator.VertexAITextGenerator.run"></a>

#### VertexAITextGenerator.run

```python
@component.output_types(replies=List[str],
                        safety_attributes=Dict[str, float],
                        citations=List[Dict[str, Any]])
def run(prompt: str)
```

Prompts the model to generate text.

**Arguments**:

- `prompt`: The prompt to use for text generation.

**Returns**:

A dictionary with the following keys:
- `replies`: A list of generated replies.
- `safety_attributes`: A dictionary with the [safety scores](https://cloud.google.com/vertex-ai/generative-ai/docs/learn/responsible-ai#safety_attribute_descriptions)
  of each answer.
- `citations`: A list of citations for each answer.

<a id="haystack_integrations.components.generators.google_vertex.chat.gemini"></a>

## Module haystack\_integrations.components.generators.google\_vertex.chat.gemini

<a id="haystack_integrations.components.generators.google_vertex.chat.gemini.VertexAIGeminiChatGenerator"></a>

### VertexAIGeminiChatGenerator

`VertexAIGeminiChatGenerator` enables chat completion using Google Gemini models.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

### Usage example
```python
from haystack.dataclasses import ChatMessage
from haystack_integrations.components.generators.google_vertex import VertexAIGeminiChatGenerator

gemini_chat = VertexAIGeminiChatGenerator()

messages = [ChatMessage.from_user("Tell me the name of a movie")]
res = gemini_chat.run(messages)

print(res["replies"][0].text)
>>> The Shawshank Redemption

#### With Tool calling:

```python
from typing import Annotated
from haystack.utils import Secret
from haystack.dataclasses.chat_message import ChatMessage
from haystack.components.tools import ToolInvoker
from haystack.tools import create_tool_from_function

from haystack_integrations.components.generators.google_vertex import VertexAIGeminiChatGenerator

__example function to get the current weather__

def get_current_weather(
    location: Annotated[str, "The city for which to get the weather, e.g. 'San Francisco'"] = "Munich",
    unit: Annotated[str, "The unit for the temperature, e.g. 'celsius'"] = "celsius",
) -> str:
    return f"The weather in {location} is sunny. The temperature is 20 {unit}."

tool = create_tool_from_function(get_current_weather)
tool_invoker = ToolInvoker(tools=[tool])

gemini_chat = VertexAIGeminiChatGenerator(
    model="gemini-2.0-flash-exp",
    tools=[tool],
)
user_message = [ChatMessage.from_user("What is the temperature in celsius in Berlin?")]
replies = gemini_chat.run(messages=user_message)["replies"]
print(replies[0].tool_calls)

__actually invoke the tool__

tool_messages = tool_invoker.run(messages=replies)["tool_messages"]
messages = user_message + replies + tool_messages

__transform the tool call result into a human readable message__

final_replies = gemini_chat.run(messages=messages)["replies"]
print(final_replies[0].text)
```

<a id="haystack_integrations.components.generators.google_vertex.chat.gemini.VertexAIGeminiChatGenerator.__init__"></a>

#### VertexAIGeminiChatGenerator.\_\_init\_\_

```python
def __init__(*,
             model: str = "gemini-1.5-flash",
             project_id: Optional[str] = None,
             location: Optional[str] = None,
             generation_config: Optional[Union[GenerationConfig,
                                               Dict[str, Any]]] = None,
             safety_settings: Optional[Dict[HarmCategory,
                                            HarmBlockThreshold]] = None,
             tools: Optional[List[Tool]] = None,
             tool_config: Optional[ToolConfig] = None,
             streaming_callback: Optional[StreamingCallbackT] = None)
```

`VertexAIGeminiChatGenerator` enables chat completion using Google Gemini models.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

**Arguments**:

- `model`: Name of the model to use. For available models, see https://cloud.google.com/vertex-ai/generative-ai/docs/learn/models.
- `project_id`: ID of the GCP project to use. By default, it is set during Google Cloud authentication.
- `location`: The default location to use when making API calls, if not set uses us-central-1.
Defaults to None.
- `generation_config`: Configuration for the generation process.
See the [GenerationConfig documentation](https://cloud.google.com/python/docs/reference/aiplatform/latest/vertexai.generative_models.GenerationConfig
for a list of supported arguments.
- `safety_settings`: Safety settings to use when generating content. See the documentation
for [HarmBlockThreshold](https://cloud.google.com/python/docs/reference/aiplatform/latest/vertexai.generative_models.HarmBlockThreshold)
and [HarmCategory](https://cloud.google.com/python/docs/reference/aiplatform/latest/vertexai.generative_models.HarmCategory)
for more details.
- `tools`: A list of tools for which the model can prepare calls.
- `tool_config`: The tool config to use. See the documentation for [ToolConfig]
(https://cloud.google.com/vertex-ai/generative-ai/docs/reference/python/latest/vertexai.generative_models.ToolConfig)
- `streaming_callback`: A callback function that is called when a new token is received from
the stream. The callback function accepts StreamingChunk as an argument.

<a id="haystack_integrations.components.generators.google_vertex.chat.gemini.VertexAIGeminiChatGenerator.to_dict"></a>

#### VertexAIGeminiChatGenerator.to\_dict

```python
def to_dict() -> Dict[str, Any]
```

Serializes the component to a dictionary.

**Returns**:

Dictionary with serialized data.

<a id="haystack_integrations.components.generators.google_vertex.chat.gemini.VertexAIGeminiChatGenerator.from_dict"></a>

#### VertexAIGeminiChatGenerator.from\_dict

```python
@classmethod
def from_dict(cls, data: Dict[str, Any]) -> "VertexAIGeminiChatGenerator"
```

Deserializes the component from a dictionary.

**Arguments**:

- `data`: Dictionary to deserialize from.

**Returns**:

Deserialized component.

<a id="haystack_integrations.components.generators.google_vertex.chat.gemini.VertexAIGeminiChatGenerator.run"></a>

#### VertexAIGeminiChatGenerator.run

```python
@component.output_types(replies=List[ChatMessage])
def run(messages: List[ChatMessage],
        streaming_callback: Optional[StreamingCallbackT] = None,
        *,
        tools: Optional[List[Tool]] = None)
```

**Arguments**:

- `messages`: A list of `ChatMessage` instances, representing the input messages.
- `streaming_callback`: A callback function that is called when a new token is received from the stream.
- `tools`: A list of tools for which the model can prepare calls. If set, it will override the `tools` parameter set
during component initialization.

**Returns**:

A dictionary containing the following key:
- `replies`:  A list containing the generated responses as `ChatMessage` instances.

<a id="haystack_integrations.components.generators.google_vertex.chat.gemini.VertexAIGeminiChatGenerator.run_async"></a>

#### VertexAIGeminiChatGenerator.run\_async

```python
@component.output_types(replies=List[ChatMessage])
async def run_async(messages: List[ChatMessage],
                    streaming_callback: Optional[StreamingCallbackT] = None,
                    *,
                    tools: Optional[List[Tool]] = None)
```

Async version of the run method. Generates text based on the provided messages.

**Arguments**:

- `messages`: A list of `ChatMessage` instances, representing the input messages.
- `streaming_callback`: A callback function that is called when a new token is received from the stream.
- `tools`: A list of tools for which the model can prepare calls. If set, it will override the `tools` parameter set
during component initialization.

**Returns**:

A dictionary containing the following key:
- `replies`:  A list containing the generated responses as `ChatMessage` instances.

<a id="haystack_integrations.components.embedders.google_vertex.document_embedder"></a>

## Module haystack\_integrations.components.embedders.google\_vertex.document\_embedder

<a id="haystack_integrations.components.embedders.google_vertex.document_embedder.VertexAIDocumentEmbedder"></a>

### VertexAIDocumentEmbedder

Embed text using Vertex AI Embeddings API.

See available models in the official
[Google documentation](https://cloud.google.com/vertex-ai/generative-ai/docs/model-reference/text-embeddings-api#syntax).

Usage example:
```python
from haystack import Document
from haystack_integrations.components.embedders.google_vertex import VertexAIDocumentEmbedder

doc = Document(content="I love pizza!")

document_embedder = VertexAIDocumentEmbedder(model="text-embedding-005")

result = document_embedder.run([doc])
print(result['documents'][0].embedding)
# [-0.044606007635593414, 0.02857724390923977, -0.03549133986234665,
```

<a id="haystack_integrations.components.embedders.google_vertex.document_embedder.VertexAIDocumentEmbedder.__init__"></a>

#### VertexAIDocumentEmbedder.\_\_init\_\_

```python
def __init__(model: Literal[
    "text-embedding-004",
    "text-embedding-005",
    "textembedding-gecko-multilingual@001",
    "text-multilingual-embedding-002",
    "text-embedding-large-exp-03-07",
],
             task_type: Literal[
                 "RETRIEVAL_DOCUMENT",
                 "RETRIEVAL_QUERY",
                 "SEMANTIC_SIMILARITY",
                 "CLASSIFICATION",
                 "CLUSTERING",
                 "QUESTION_ANSWERING",
                 "FACT_VERIFICATION",
                 "CODE_RETRIEVAL_QUERY",
             ] = "RETRIEVAL_DOCUMENT",
             gcp_region_name: Optional[Secret] = Secret.from_env_var(
                 "GCP_DEFAULT_REGION", strict=False),
             gcp_project_id: Optional[Secret] = Secret.from_env_var(
                 "GCP_PROJECT_ID", strict=False),
             batch_size: int = 32,
             max_tokens_total: int = 20000,
             time_sleep: int = 30,
             retries: int = 3,
             progress_bar: bool = True,
             truncate_dim: Optional[int] = None,
             meta_fields_to_embed: Optional[List[str]] = None,
             embedding_separator: str = "\n") -> None
```

Generate Document Embedder using a Google Vertex AI model.

Authenticates using Google Cloud Application Default Credentials (ADCs).
For more information see the official [Google documentation](https://cloud.google.com/docs/authentication/provide-credentials-adc).

**Arguments**:

- `model`: Name of the model to use.
- `task_type`: The type of task for which the embeddings are being generated.
For more information see the official [Google documentation](https://cloud.google.com/vertex-ai/generative-ai/docs/model-reference/text-embeddings-api#tasktype).
- `gcp_region_name`: The default location to use when making API calls, if not set uses us-central-1.
- `gcp_project_id`: ID of the GCP project to use. By default, it is set during Google Cloud authentication.
- `batch_size`: The number of documents to process in a single batch.
- `max_tokens_total`: The maximum number of tokens to process in total.
- `time_sleep`: The time to sleep between retries in seconds.
- `retries`: The number of retries in case of failure.
- `progress_bar`: Whether to display a progress bar during processing.
- `truncate_dim`: The dimension to truncate the embeddings to, if specified.
- `meta_fields_to_embed`: A list of metadata fields to include in the embeddings.
- `embedding_separator`: The separator to use between different embeddings.

**Raises**:

- `ValueError`: If the provided model is not in the list of supported models.

<a id="haystack_integrations.components.embedders.google_vertex.document_embedder.VertexAIDocumentEmbedder.get_text_embedding_input"></a>

#### VertexAIDocumentEmbedder.get\_text\_embedding\_input

```python
def get_text_embedding_input(
        batch: List[Document]) -> List[TextEmbeddingInput]
```

Converts a batch of Document objects into a list of TextEmbeddingInput objects.

**Arguments**:

- `batch` _List[Document]_ - A list of Document objects to be converted.


**Returns**:

- `List[TextEmbeddingInput]` - A list of TextEmbeddingInput objects created from the input documents.

<a id="haystack_integrations.components.embedders.google_vertex.document_embedder.VertexAIDocumentEmbedder.embed_batch_by_smaller_batches"></a>

#### VertexAIDocumentEmbedder.embed\_batch\_by\_smaller\_batches

```python
def embed_batch_by_smaller_batches(batch: List[str],
                                   subbatch=1) -> List[List[float]]
```

Embeds a batch of text strings by dividing them into smaller sub-batches.

**Arguments**:

- `batch` _List[str]_ - A list of text strings to be embedded.
- `subbatch` _int, optional_ - The size of the smaller sub-batches. Defaults to 1.

**Returns**:

- `List[List[float]]` - A list of embeddings, where each embedding is a list of floats.

**Raises**:

- `Exception` - If embedding fails at the item level, an exception is raised with the error details.

<a id="haystack_integrations.components.embedders.google_vertex.document_embedder.VertexAIDocumentEmbedder.embed_batch"></a>

#### VertexAIDocumentEmbedder.embed\_batch

```python
def embed_batch(batch: List[str]) -> List[List[float]]
```

Generate embeddings for a batch of text strings.

**Arguments**:

- `batch` _List[str]_ - A list of text strings to be embedded.


**Returns**:

- `List[List[float]]` - A list of embeddings, where each embedding is a list of floats.

<a id="haystack_integrations.components.embedders.google_vertex.document_embedder.VertexAIDocumentEmbedder.run"></a>

#### VertexAIDocumentEmbedder.run

```python
@component.output_types(documents=List[Document])
def run(documents: List[Document])
```

Processes all documents in batches while adhering to the API's token limit per request.

**Arguments**:

- `documents`: A list of documents to embed.

**Returns**:

A dictionary with the following keys:
- `documents`: A list of documents with embeddings.

<a id="haystack_integrations.components.embedders.google_vertex.document_embedder.VertexAIDocumentEmbedder.to_dict"></a>

#### VertexAIDocumentEmbedder.to\_dict

```python
def to_dict() -> Dict[str, Any]
```

Serializes the component to a dictionary.

**Returns**:

Dictionary with serialized data.

<a id="haystack_integrations.components.embedders.google_vertex.document_embedder.VertexAIDocumentEmbedder.from_dict"></a>

#### VertexAIDocumentEmbedder.from\_dict

```python
@classmethod
def from_dict(cls, data: Dict[str, Any]) -> "VertexAIDocumentEmbedder"
```

Deserializes the component from a dictionary.

**Arguments**:

- `data`: Dictionary to deserialize from.

**Returns**:

Deserialized component.

<a id="haystack_integrations.components.embedders.google_vertex.text_embedder"></a>

## Module haystack\_integrations.components.embedders.google\_vertex.text\_embedder

<a id="haystack_integrations.components.embedders.google_vertex.text_embedder.VertexAITextEmbedder"></a>

### VertexAITextEmbedder

Embed text using VertexAI Text Embeddings API.

See available models in the official
[Google documentation](https://cloud.google.com/vertex-ai/generative-ai/docs/model-reference/text-embeddings-api#syntax).

Usage example:
```python
from haystack_integrations.components.embedders.google_vertex import VertexAITextEmbedder

text_to_embed = "I love pizza!"

text_embedder = VertexAITextEmbedder(model="text-embedding-005")

print(text_embedder.run(text_to_embed))
# {'embedding': [-0.08127457648515701, 0.03399784862995148, -0.05116401985287666, ...]
```

<a id="haystack_integrations.components.embedders.google_vertex.text_embedder.VertexAITextEmbedder.__init__"></a>

#### VertexAITextEmbedder.\_\_init\_\_

```python
def __init__(model: Literal[
    "text-embedding-004",
    "text-embedding-005",
    "textembedding-gecko-multilingual@001",
    "text-multilingual-embedding-002",
    "text-embedding-large-exp-03-07",
],
             task_type: Literal[
                 "RETRIEVAL_DOCUMENT",
                 "RETRIEVAL_QUERY",
                 "SEMANTIC_SIMILARITY",
                 "CLASSIFICATION",
                 "CLUSTERING",
                 "QUESTION_ANSWERING",
                 "FACT_VERIFICATION",
                 "CODE_RETRIEVAL_QUERY",
             ] = "RETRIEVAL_QUERY",
             gcp_region_name: Optional[Secret] = Secret.from_env_var(
                 "GCP_DEFAULT_REGION", strict=False),
             gcp_project_id: Optional[Secret] = Secret.from_env_var(
                 "GCP_PROJECT_ID", strict=False),
             progress_bar: bool = True,
             truncate_dim: Optional[int] = None) -> None
```

Initializes the TextEmbedder with the specified model, task type, and GCP configuration.

**Arguments**:

- `model`: Name of the model to use.
- `task_type`: The type of task for which the embeddings are being generated.
For more information see the official [Google documentation](https://cloud.google.com/vertex-ai/generative-ai/docs/model-reference/text-embeddings-api#tasktype).
- `gcp_region_name`: The default location to use when making API calls, if not set uses us-central-1.
- `gcp_project_id`: ID of the GCP project to use. By default, it is set during Google Cloud authentication.
- `progress_bar`: Whether to display a progress bar during processing.
- `truncate_dim`: The dimension to truncate the embeddings to, if specified.

<a id="haystack_integrations.components.embedders.google_vertex.text_embedder.VertexAITextEmbedder.run"></a>

#### VertexAITextEmbedder.run

```python
@component.output_types(embedding=List[float])
def run(text: Union[List[Document], List[str], str])
```

Processes text in batches while adhering to the API's token limit per request.

**Arguments**:

- `text`: The text to embed.

**Returns**:

A dictionary with the following keys:
- `embedding`: The embedding of the input text.

<a id="haystack_integrations.components.embedders.google_vertex.text_embedder.VertexAITextEmbedder.to_dict"></a>

#### VertexAITextEmbedder.to\_dict

```python
def to_dict() -> Dict[str, Any]
```

Serializes the component to a dictionary.

**Returns**:

Dictionary with serialized data.

<a id="haystack_integrations.components.embedders.google_vertex.text_embedder.VertexAITextEmbedder.from_dict"></a>

#### VertexAITextEmbedder.from\_dict

```python
@classmethod
def from_dict(cls, data: Dict[str, Any]) -> "VertexAITextEmbedder"
```

Deserializes the component from a dictionary.

**Arguments**:

- `data`: Dictionary to deserialize from.

**Returns**:

Deserialized component.