langchain-deepseek-v4 0.1.0

LangChain integration package for DeepSeek chat models

langchain_deepseek_v4

LangChain chat model integration for the current DeepSeek Chat Completions API.

Install the distribution package and import the integration module:

pip install langchain_deepseek_v4

This implementation targets the DeepSeek API documented at https://api-docs.deepseek.com, including:

• Tool calling
• JSON structured output through DeepSeek JSON Output
• Thinking mode and reasoning_content
• Streaming chunks that preserve reasoning deltas
• Multi-turn conversations that pass tool-call reasoning back to DeepSeek

from langchain_deepseek import ChatDeepSeek

llm = ChatDeepSeek(
    model="deepseek-v4-pro",
    api_key="...",
    thinking={"type": "enabled"},
    reasoning_effort="high",
)

msg = llm.invoke("Say hello in JSON: {\"message\": \"...\"}")