OpenAI Codex CLI rust-v0.155.1
OpenAI Codex CLI rust-v0.155.1 was released on .
Summary
OpenAI Codex CLI rust-v0.155.1 fixes a critical issue where new local TUI sessions were incorrectly enabling reasoning summaries, causing rejections from some providers. This update restores the proper default while preserving your explicit settings. Check out what else improv...
Release Context
- This was the 93rd OpenAI Codex CLI release of 2026 tracked by Havoptic.
- It shipped 1 day after OpenAI Codex CLI rust-v0.155.0 (September 17, 2026).
- OpenAI Codex CLI: ships every 1.9 days — 15 releases in the last month.
Why it matters: Fix Provider Compatibility Issues With TUI Sessions.
Shipped around the same time
Within 3 days of this release, other AI coding tools also shipped:
- GitHub Copilot CLI v1.0.87 (September 21, 2026)
- Grok Build v1.0.40 (September 20, 2026)
- Grok Build v1.0.39 (September 20, 2026)
- Claude Code v2.1.278 (September 19, 2026)
- Antigravity CLI v1.2.7 (September 19, 2026)
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
Release Notes
Bug Fixes - New local TUI sessions now leave reasoning summaries disabled by default, fixing request rejection by providers that do not support them. Explicit reasoning-summary settings remain respected. (46467) Changelog Full Changelog: https://github.com/openai/codex/compare/rust-v0.155.0...rust-v0.155.1 - 46467 Restore none as the TUI reasoning summary default (@celia-oai)
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