What happened: Introducing LangSmith Fine-Tuning

LangChain released smithtune, a CLI tool that converts agent trajectories from LangSmith into fine-tuned models via Fireworks or Baseten.

Why it matters: Introducing LangSmith Fine-Tuning

Engineers building agents who want to specialize models on their own task examples without managing training infrastructure themselves.

Smithtune currently supports only supervised fine-tuning, not other post-training methods. Data quality and curation are critical to success.

In the news

LangChain · Published September 24, 2026 · 3 min read

What happened: LangChain released smithtune, a CLI tool that converts agent trajectories from LangSmith into fine-tuned models via Fireworks or Baseten.
Why it matters: Engineers building agents who want to specialize models on their own task examples without managing training infrastructure themselves.
Watch out: Smithtune currently supports only supervised fine-tuning, not other post-training methods. Data quality and curation are critical to success.

The same event, reported by other publishers we follow.

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