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LangChain Forum - Latest posts

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No cost displayed in LangSmith when using LiteLLM + LangG...
@pawel-tward · 2026-04-17 · via LangChain Forum - Latest posts

Hey, I’m using ChatLiteLLMRouter with LangGraph. Token count is tracked correctly in LangSmith, but cost is never shown - for any model (OpenAI, Anthropic, Gemini). I tried adding langsmith callback as described here: import litellm from langchain_litellm import ChatLiteLLMRouter litellm.success_callback = ["langsmith"] llm = ChatLiteLLMRouter( # then use `llm` in my graph router=litellm_router, model="heavy", temperature=0, streaming=True, ) This does show tokens + cost, but cr...