Claude Code 2.1.70 release notes

Version

2.1.70

Released

6 March 2026

Status

Stable release

What's new in Claude Code 2.1.70

The official notes for Claude Code 2.1.70 list 29 changes: 19 fixes, 2 performance improvements, 1 security change and 7 other changes.

• 19 fixes
• 2 performance improvements
• 1 security change
• 7 other changes

Highlights

• security change Fixed /security-review command failing with unknown option merge-base on older git versions
• performance improvement Improved compaction to preserve images in the summarizer request, allowing prompt cache reuse for faster and cheaper compaction
• performance improvement Reduced startup memory by ~426KB for users without custom CA certificates
• fix Fixed API 400 errors when using ANTHROPIC_BASE_URL with a third-party gateway — tool search now correctly detects proxy endpoints and…
• fix Fixed API Error: 400 This model does not support the effort parameter when using custom Bedrock inference profiles or other…

Our short summary: changes are counted and classified automatically from the official notes, and highlights are shortened. The complete, authoritative list is in the official release notes on GitHub.

Full release notes on GitHub (Claude Code 2.1.70)

All Claude Code release notes · All releases

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