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https://github.com/hwchase17/langchain.git
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f9fd7be695
Add a first-party `langchain-openrouter` partner package (`ChatOpenRouter`) that wraps the official `openrouter` Python SDK, providing native support for OpenRouter-specific features that `ChatOpenAI` intentionally does not handle. Also adds scope-clarifying docstrings to `ChatOpenAI` / `BaseChatOpenAI` warning users away from using `base_url` overrides with third-party providers. --- Closes #31325 Closes #32967 Closes #32977 Closes #32981 Closes #33643 Closes #33757 Closes #34056 Closes #34797 Closes #34962 Supersedes #33902, #34867 (thank you @elonfeng and @okamototk for your initial work on this!) --- Bugs with upstream sdk: - https://github.com/OpenRouterTeam/python-sdk/issues/38 - https://github.com/OpenRouterTeam/python-sdk/issues/51 - https://github.com/OpenRouterTeam/python-sdk/issues/52
70 lines
2.3 KiB
Python
70 lines
2.3 KiB
Python
"""Integration tests for `ChatOpenRouter` chat model."""
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from __future__ import annotations
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import pytest
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from langchain_core.messages import AIMessageChunk, BaseMessageChunk
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from pydantic import BaseModel, Field
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from langchain_openrouter.chat_models import ChatOpenRouter
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def test_basic_invoke() -> None:
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"""Test basic invocation."""
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model = ChatOpenRouter(model="openai/gpt-4o-mini", temperature=0)
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response = model.invoke("Say 'hello' and nothing else.")
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assert response.content
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assert response.response_metadata.get("model_provider") == "openrouter"
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def test_streaming() -> None:
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"""Test streaming."""
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model = ChatOpenRouter(model="openai/gpt-4o-mini", temperature=0)
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full: BaseMessageChunk | None = None
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for chunk in model.stream("Say 'hello' and nothing else."):
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full = chunk if full is None else full + chunk
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assert isinstance(full, AIMessageChunk)
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assert full.content
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def test_tool_calling() -> None:
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"""Test tool calling via OpenRouter."""
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class GetWeather(BaseModel):
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"""Get the current weather in a given location."""
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location: str = Field(description="The city and state")
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model = ChatOpenRouter(model="openai/gpt-4o-mini", temperature=0)
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model_with_tools = model.bind_tools([GetWeather])
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response = model_with_tools.invoke("What's the weather in San Francisco?")
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assert response.tool_calls
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def test_structured_output() -> None:
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"""Test structured output via OpenRouter."""
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class Joke(BaseModel):
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"""A joke."""
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setup: str = Field(description="The setup of the joke")
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punchline: str = Field(description="The punchline of the joke")
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model = ChatOpenRouter(model="openai/gpt-4o-mini", temperature=0)
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structured = model.with_structured_output(Joke)
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result = structured.invoke("Tell me a joke about programming")
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assert isinstance(result, Joke)
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assert result.setup
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assert result.punchline
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@pytest.mark.xfail(reason="Depends on reasoning model availability on OpenRouter.")
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def test_reasoning_content() -> None:
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"""Test reasoning content from a reasoning model."""
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model = ChatOpenRouter(
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model="openai/o3-mini",
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reasoning={"effort": "low"},
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)
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response = model.invoke("What is 2 + 2?")
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assert response.content
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