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LangSmith launches fine-tuning and the smithtune CLI

LangSmith added end-to-end fine-tuning that uses existing trace data to train specialized models for lower cost and latency, now in public beta.

LangChain

@LangChainArchived 2026.09.25Originally posted 2026.09.25

LangChain @LangChainOriginally posted 2026.09.25

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Introducing LangSmith Fine-Tuning and the smithtune CLI. LangSmith now handles the entire fine-tuning process. Use your traces to train specialized models that cut cost and latency. Now in Public Beta. https://t.co/hhH5Tvlm7e

x.com/langchain/status/2103182716720099748Archived 2026.09.25 11:56