LangChain launches smithtune CLI to fine-tune models on LangSmith traces
LangChain · x · 2026-09-25
LangChain released LangSmith Fine-Tuning (public beta) with an open-source CLI, smithtune, covering the full post-training loop: pull, select, and process agent trajectories from LangSmith; train on Fireworks AI or Baseten; eval base vs. tuned models back in LangSmith; optionally deploy an endpoint. A bundled skill lets coding agents like Claude Code, Codex, and Cursor run the whole flow. Early beta, open-sourced on GitHub.
Related event: LangChain Launches LangSmith Fine-Tuning Beta with smithtune CLI(11 posts)→
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