OpenAI Codex CLI rust-v0.27.0
OpenAI Codex CLI rust-v0.27.0 was released on .
Summary
Codex 0.27.0 - MCP stability: drop mutexes earlier and avoid lock ordering pitfalls.
Release Context
- This was the 24th OpenAI Codex CLI release of 2025 tracked by Havoptic.
- It shipped the same day as OpenAI Codex CLI rust-v0.26.0 (August 29, 2025).
Shipped around the same time
Within 3 days of this release, other AI coding tools also shipped:
- Gemini CLI v0.2.2 (August 28, 2025)
- Gemini CLI v0.3.0-preview.1 (August 28, 2025)
- Claude Code v1.0.94 (August 27, 2025)
- Gemini CLI v0.2.1 (August 27, 2025)
- Gemini CLI v0.2.0 (August 27, 2025)
Compare OpenAI Codex CLI: vs Claude Code · vs Cursor · vs Gemini CLI · vs Kiro CLI · vs GitHub Copilot CLI · vs Devin Desktop · vs Antigravity CLI · vs Grok Build
Other Recent OpenAI Codex CLI Releases
- python-v0.154.0 (September 10, 2026)
- rust-v0.154.0 (September 9, 2026)
- rust-v0.153.4 (September 4, 2026)
- rust-v0.153.3 (September 4, 2026)
- rust-v0.153.2 (September 3, 2026)
All OpenAI Codex CLI releases · All AI coding tool releases on Havoptic