Claude Code v2.1.263

Release Context

• This was the 209th Claude Code release of 2026 tracked by Havoptic.
• It shipped 1 day after Claude Code v2.1.261 (September 4, 2026).
• Claude Code: ships every 1 days — 30 releases in the last month.

Shipped around the same time

Within 3 days of this release, other AI coding tools also shipped:

• Antigravity CLI v1.1.27 (September 5, 2026)
• OpenAI Codex CLI rust-v0.153.4 (September 4, 2026)
• OpenAI Codex CLI rust-v0.153.3 (September 4, 2026)
• GitHub Copilot CLI v1.0.83 (September 4, 2026)
• Antigravity CLI v1.1.26 (September 4, 2026)

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 · vs Grok Build