Releases · Codex
Codex CLI 0.40.0 release notes
- Version
- 0.40.0
- Released
- Status
- Stable release
What's new in Codex CLI 0.40.0
The official notes for Codex CLI 0.40.0 list 5 changes: 1 new feature and 4 other changes.
- 1 new feature
- 4 other changes
Highlights
- new feature New /review commands (review specific commit, against a base branch, or custom instructions)
- other change Default model is now gpt-5-codex
- other change Autocompaction is triggered automatically for gpt-5-codex when hitting 220k tokens
- other change Usage limits are now visible in /status
- other change The default timeout for MCP tool calls is 60s and can be overridden in config.toml by setting tool_timeout_sec for an…
Our short summary: changes are counted and classified automatically from the official notes, and highlights are shortened. The complete, authoritative list is in the official release notes on GitHub.
Full release notes on GitHub (Codex CLI 0.40.0)
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