Claude Code v1.0.21
Claude Code v1.0.21 was released on .
Summary
- Improved editing of files with tab-based indentation - Fix for tooluse without matching toolresult errors
Release Context
- This was the 43rd Claude Code release of 2025 tracked by Havoptic.
- It shipped 2 days after Claude Code v1.0.18 (June 9, 2025).
Shipped around the same time
Within 3 days of this release, other AI coding tools also shipped:
- Devin Desktop v1.10.3 (June 12, 2025)
- Devin Desktop v1.10.1 (June 10, 2025)
Compare Claude Code
Other Recent Claude Code Releases
- v2.1.300 (October 14, 2026)
- v2.1.299 (October 14, 2026)
- v2.1.296 (October 9, 2026)
- v2.1.295 (October 8, 2026)
- v2.1.294 (October 8, 2026)
Upgrading from v1.0.21? See all 371 releases since.
All Claude Code releases · All AI coding tool releases on Havoptic