Claude Code v1.0.21

Claude Code v1.0.21 was released on June 11, 2025.

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: vs OpenAI Codex CLI · vs Cursor · vs Gemini CLI · vs Kiro CLI · vs GitHub Copilot CLI · vs Devin Desktop · vs Antigravity CLI

View original release

Other Recent Claude Code Releases

v2.1.215 (July 19, 2026)
v2.1.214 (July 18, 2026)
v2.1.212 (July 16, 2026)
v2.1.211 (July 15, 2026)
v2.1.210 (July 14, 2026)

All Claude Code releases · All AI coding tool releases on Havoptic