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Written by AI from the official notes. Check them for exact details.Claude Code 2.1.170 introduces Claude Fable 5 and fixes a session transcript issue.
- Introduced Claude Fable 5, a Mythos-class model for general use.
- Fable's capabilities exceed previous models.
- Fixed session transcripts not saving from VS Code terminal.
Why it matters: Users of Claude Code should update to access the new model and benefit from the bug fix.
Full release notes2 changes
What's changed
- Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use. Fable’s capabilities exceed those of any model we’ve ever made generally available. Update to version 2.1.170 for access. https://www.anthropic.com/news/claude-fable-5-mythos-5
- Fixed sessions not saving transcripts (and not appearing in --resume) when launched from the VS Code integrated terminal or any shell that inherited Claude Code environment variables.