uipath-langchain-client 1.9.3

LangChain-compatible chat models and embeddings for UiPath's LLM services

UiPath LangChain Client

LangChain-compatible chat models and embeddings for accessing LLMs through UiPath's infrastructure.

Installation

# Base installation (normalized API only)
pip install uipath-langchain-client

# With specific provider extras for passthrough mode
pip install "uipath-langchain-client[openai]"      # OpenAI/Azure models
pip install "uipath-langchain-client[google]"      # Google Gemini models
pip install "uipath-langchain-client[anthropic]"   # Anthropic Claude models
pip install "uipath-langchain-client[azure]"       # Azure AI models
pip install "uipath-langchain-client[bedrock]"      # AWS Bedrock models
pip install "uipath-langchain-client[vertexai]"    # Google VertexAI models
pip install "uipath-langchain-client[fireworks]"   # Fireworks AI models
pip install "uipath-langchain-client[all]"         # All providers

Quick Start

Using Factory Functions (Recommended)

The factory functions automatically detect the model vendor and return the appropriate client:

from uipath_langchain_client import get_chat_model, get_embedding_model
from uipath_langchain_client.settings import get_default_client_settings

# Get default settings (uses UIPATH_LLM_SERVICE env var or defaults to AgentHub)
settings = get_default_client_settings()

# Chat model - vendor auto-detected from model name
chat_model = get_chat_model(
    model_name="gpt-4o-2024-11-20",
    client_settings=settings,
)
response = chat_model.invoke("Hello, how are you?")
print(response.content)

# Embeddings model
embeddings = get_embedding_model(
    model_name="text-embedding-3-large",
    client_settings=settings,
)
vectors = embeddings.embed_documents(["Hello world"])
print(f"Embedding dimension: {len(vectors[0])}")

Using Direct Client Classes

For more control, instantiate provider-specific classes directly:

from uipath_langchain_client.clients.openai.chat_models import UiPathAzureChatOpenAI
from uipath_langchain_client.clients.google.chat_models import UiPathChatGoogleGenerativeAI
from uipath_langchain_client.clients.anthropic.chat_models import UiPathChatAnthropic
from uipath_langchain_client.clients.normalized.chat_models import UiPathChat
from uipath_langchain_client.settings import get_default_client_settings

settings = get_default_client_settings()

# OpenAI/Azure
openai_chat = UiPathAzureChatOpenAI(model="gpt-4o-2024-11-20", settings=settings)

# Google Gemini
gemini_chat = UiPathChatGoogleGenerativeAI(model="gemini-2.5-flash", settings=settings)

# Anthropic Claude (via AWS Bedrock)
claude_chat = UiPathChatAnthropic(
    model="anthropic.claude-sonnet-4-5-20250929-v1:0",
    settings=settings,
    vendor_type="awsbedrock",
)

# Normalized (provider-agnostic)
normalized_chat = UiPathChat(model="gpt-4o-2024-11-20", settings=settings)

Available Client Types

Passthrough Mode (Default)

Uses vendor-specific APIs through UiPath's gateway. Full feature parity with native SDKs.

Chat Models:

Class	Provider	Extra	Models
UiPathAzureChatOpenAI	OpenAI/Azure (UiPath-owned)	[openai]	GPT-4o, GPT-4, o1, o3, etc.
UiPathChatOpenAI	OpenAI (BYO)	[openai]	GPT-4o, GPT-4, etc.
UiPathChatGoogleGenerativeAI	Google	[google]	Gemini 2.5, 2.0, 1.5
UiPathChatAnthropic	Anthropic (via Bedrock)	[anthropic]	Claude Sonnet 4.5, Opus, etc.
UiPathChatAnthropicVertex	Anthropic (via VertexAI)	[vertexai]	Claude models
UiPathChatBedrock	AWS Bedrock (invoke API)	[bedrock]	Bedrock-hosted models
UiPathChatBedrockConverse	AWS Bedrock (Converse API)	[bedrock]	Bedrock-hosted models
UiPathChatFireworks	Fireworks AI	[fireworks]	Various open-source models
UiPathAzureAIChatCompletionsModel	Azure AI	[azure]	Various Azure AI models

Embeddings:

Class	Provider	Extra	Models
UiPathAzureOpenAIEmbeddings	OpenAI/Azure (UiPath-owned)	[openai]	text-embedding-3-large/small
UiPathOpenAIEmbeddings	OpenAI (BYO)	[openai]	text-embedding-3-large/small
UiPathGoogleGenerativeAIEmbeddings	Google	[google]	text-embedding-004
UiPathBedrockEmbeddings	AWS Bedrock	[bedrock]	Titan Embeddings, etc.
UiPathFireworksEmbeddings	Fireworks AI	[fireworks]	Various
UiPathAzureAIEmbeddingsModel	Azure AI	[azure]	Various Azure AI models

Normalized Mode

Uses UiPath's normalized API for a consistent interface across all providers. No extra dependencies required.

Class	Type	Description
UiPathChat	Chat	Provider-agnostic chat completions
UiPathEmbeddings	Embeddings	Provider-agnostic embeddings

Features

Streaming

from uipath_langchain_client import get_chat_model
from uipath_langchain_client.settings import get_default_client_settings

settings = get_default_client_settings()
chat_model = get_chat_model(model_name="gpt-4o-2024-11-20", client_settings=settings)

# Sync streaming
for chunk in chat_model.stream("Write a haiku about Python"):
    print(chunk.content, end="", flush=True)

# Async streaming
async for chunk in chat_model.astream("Write a haiku about Python"):
    print(chunk.content, end="", flush=True)

Tool Calling

from langchain_core.tools import tool

@tool
def get_weather(city: str) -> str:
    """Get the current weather for a city."""
    return f"Sunny, 72°F in {city}"

chat_model = get_chat_model(model_name="gpt-4o-2024-11-20", client_settings=settings)
model_with_tools = chat_model.bind_tools([get_weather])

response = model_with_tools.invoke("What's the weather in Tokyo?")
print(response.tool_calls)

LangGraph Agents

from langgraph.prebuilt import create_react_agent
from langchain_core.tools import tool

@tool
def search(query: str) -> str:
    """Search the web."""
    return f"Results for: {query}"

chat_model = get_chat_model(model_name="gpt-4o-2024-11-20", client_settings=settings)
agent = create_react_agent(chat_model, [search])

result = agent.invoke({"messages": [("user", "Search for UiPath documentation")]})

Extended Thinking (Model-Specific)

# OpenAI o1/o3 reasoning
chat_model = get_chat_model(
    model_name="o3-mini",
    client_settings=settings,
    client_type="normalized",
    reasoning_effort="medium",  # "low", "medium", "high"
)

# Anthropic Claude thinking
chat_model = get_chat_model(
    model_name="claude-sonnet-4-5",
    client_settings=settings,
    client_type="normalized",
    thinking={"type": "enabled", "budget_tokens": 10000},
)

# Gemini thinking
chat_model = get_chat_model(
    model_name="gemini-2.5-pro",
    client_settings=settings,
    client_type="normalized",
    thinking_level="medium",
    include_thoughts=True,
)

Configuration

Retry Configuration

# RetryConfig is a TypedDict - all fields are optional with sensible defaults
retry_config = {
    "initial_delay": 2.0,   # Initial delay before first retry
    "max_delay": 60.0,      # Maximum delay between retries
    "exp_base": 2.0,        # Exponential backoff base
    "jitter": 1.0,          # Random jitter to add
}

chat_model = get_chat_model(
    model_name="gpt-4o-2024-11-20",
    client_settings=settings,
    max_retries=3,
    retry_config=retry_config,
)

Request Timeout

chat_model = get_chat_model(
    model_name="gpt-4o-2024-11-20",
    client_settings=settings,
    request_timeout=120,  # Client-side timeout in seconds
)

API Reference

get_chat_model()

Factory function to create a chat model. Automatically detects the model vendor by querying UiPath's discovery endpoint and returns the appropriate LangChain model class.

Parameters:

• model_name (str): Name of the model (e.g., "gpt-4o-2024-11-20")
• byo_connection_id (str | None): Optional BYO connection ID for custom-enrolled models (default: None)
• client_settings (UiPathBaseSettings | None): Client settings for authentication (default: auto-detected)
• client_type (Literal["passthrough", "normalized"]): API mode (default: "passthrough")
• **model_kwargs: Additional arguments passed to the model constructor (e.g., max_retries, retry_config, request_timeout)

Returns: UiPathBaseChatModel - A LangChain-compatible chat model

Raises: ValueError - If the model is not found in available models or vendor is not supported

get_embedding_model()

Factory function to create an embeddings model. Automatically detects the model vendor by querying UiPath's discovery endpoint and returns the appropriate LangChain embeddings class.

Parameters:

• model_name (str): Name of the embeddings model (e.g., "text-embedding-3-large")
• byo_connection_id (str | None): Optional BYO connection ID for custom-enrolled models (default: None)
• client_settings (UiPathBaseSettings | None): Client settings for authentication (default: auto-detected)
• client_type (Literal["passthrough", "normalized"]): API mode (default: "passthrough")
• **model_kwargs: Additional arguments passed to the embeddings constructor (e.g., max_retries, retry_config, request_timeout)

Returns: UiPathBaseEmbeddings - A LangChain-compatible embeddings model

Raises: ValueError - If the model is not found or the vendor is not supported

UiPathChat Parameter Reference

The normalized UiPathChat model supports the following parameters:

Standard Parameters

Parameter	Type	Default	Description
model (alias: model_name)	str	Required	Model identifier (e.g., "gpt-4o-2024-11-20", "gemini-2.5-flash")
max_tokens	int | None	None	Maximum number of tokens in the response
temperature	float | None	None	Sampling temperature (0.0 to 2.0)
stop (alias: stop_sequences)	list[str] | str | None	None	Stop sequences to end generation
n	int | None	None	Number of completions to generate
top_p	float | None	None	Nucleus sampling probability mass
presence_penalty	float | None	None	Penalty for repeated tokens (-2.0 to 2.0)
frequency_penalty	float | None	None	Frequency-based repetition penalty (-2.0 to 2.0)
verbosity	str | None	None	Response verbosity: "low", "medium", or "high"
model_kwargs	dict[str, Any]	{}	Additional model-specific parameters
disabled_params	dict[str, Any] | None	None	Parameters to exclude from requests

Extended Thinking Parameters

Parameter	Provider	Type	Description
reasoning	OpenAI (o1/o3)	dict[str, Any] | None	Reasoning config, e.g., {"effort": "medium", "summary": "auto"}
reasoning_effort	OpenAI (o1/o3)	str | None	Shorthand: "minimal", "low", "medium", or "high"
thinking	Anthropic Claude	dict[str, Any] | None	Thinking config, e.g., {"type": "enabled", "budget_tokens": 10000}
thinking_level	Google Gemini	str | None	Thinking depth level
thinking_budget	Google Gemini	int | None	Token budget for thinking
include_thoughts	Google Gemini	bool | None	Whether to include thinking in responses

Base Client Parameters (All Models)

All LangChain model classes (UiPathChat, UiPathAzureChatOpenAI, etc.) inherit these from UiPathBaseLLMClient:

Parameter	Type	Default	Description
model (alias: model_name)	str	Required	Model identifier
settings (alias: client_settings)	UiPathBaseSettings	Auto-detected	Client settings for auth and routing
byo_connection_id	str | None	None	BYO connection ID for custom-enrolled models
request_timeout (aliases: timeout, default_request_timeout)	int | None	None	Client-side request timeout in seconds
max_retries	int	0	Maximum number of retries for failed requests
retry_config	RetryConfig | None	None	Retry configuration for failed requests
logger	logging.Logger | None	None	Logger instance for request/response logging
default_headers	Mapping[str, str] | None	See note	Additional request headers (see Default Headers)

Low-Level Methods

UiPathBaseLLMClient also exposes these methods for advanced use cases:

Method	Description
uipath_request(method, url, *, request_body, **kwargs)	Synchronous HTTP request, returns httpx.Response
uipath_arequest(method, url, *, request_body, **kwargs)	Asynchronous HTTP request, returns httpx.Response
uipath_stream(method, url, *, request_body, stream_type, **kwargs)	Synchronous streaming, yields str | bytes
uipath_astream(method, url, *, request_body, stream_type, **kwargs)	Asynchronous streaming, yields str | bytes

The stream_type parameter controls iteration: "lines" (default, best for SSE), "text", "bytes", or "raw".

See Also

• Main README - Overview and core client documentation
• UiPath LLM Client - Low-level HTTP client