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Codex CLI 0.40.0 download

Codex CLI is an open‑source local coding agent that runs in your terminal, letting you write, edit, and understand code without leaving the command line.

OpenAI, Inc. AI assistants & LLMs #2 AI assistants & LLMs
This is an older version. The current version is 0.161.0. Codex CLI 0.161.0 · Released:

Installer files 0.40.0

ArchitectureTypeScopeFile sizeDownloadSHA256
64-bit ZIP → Portable — — github.com VirusTotal
ARM64 ZIP → Portable — — github.com VirusTotal

Link and SHA256 come from the Windows Package Manager community manifest. Compare the hash of the downloaded file before running it.

Release notes

Notable Changes
- Default model is now gpt-5-codex (#4076)
- Autocompaction is triggered automatically for gpt-5-codex when hitting 220k tokens (#4093)
- Usage limits are now visible in /status (#4053)
- New /review commands (review specific commit, against a base branch, or custom instructions) (#3961)
- The default timeout for MCP tool calls is 60s and can be overridden in config.toml by setting tool_timeout_sec for an individual MCP server. (#3959)
Merged PRs
- [#3881] fix: update try_parse_word_only_commands_sequence() to return commands in order (#3881)
- [#3814] Use a unified shell tell to not break cache (#3814)
- [#3878] Move responses mocking helpers to a shared lib (#3878)
- [#3888] Use helpers instead of fixtures (#3888)
- [#3937] fix alignment in slash command popup (#3937)
- [#3925] don't clear screen on startup (#3925)
- [#3950] Cache keyboard enhancement detection before event streams (#3950)
- [#3965] Forward Rate limits to the UI (#3965)
- [#3977] Tui: Rate limits (#3977)
- [#3961] feat: Add more /review options (#3961)
- [#3880] Add non_sandbox_test helper (#3880)
- [#4044] chore: unify cargo versions (#4044)
- [#4057] chore: more clippy rules 2 (#4057)
- [#3959] timeouts for mcp tool calls (#3959)
- [#4053] Add limits to /status (#4053)
- [#3928] simplify StreamController (#3928)
- [#4020] Tui: fix backtracking (#4020)
- [#4055] Remove /limits after moving to /status (#4055)
- [#4026] feat: Add view stack to BottomPane (#4026)
- [#4059] Change limits warning copy (#4059)
- [#4058] chore: clippy on redundant closure (#4058)
- [#4061] Fix branch mode prompt for /review (#4061)
- [#4060] Change headers and struct of rate limits (#4060)
- [#3952] Fix pager overlay clear between pages (#3952)
- [#3957] fix codex resume message at end of session (#3957)
- [#4068] Truncate potentially long user messages in compact message. (#4068)
- [#4076] feat: update default (#4076)
- [#4064] Add notifier tests (#4064)
- [#4093] chore: enable auto-compaction for gpt-5-codex (#4093)
- [#4096] Use TestCodex builder in stream retry tests (#4096)
- [#3914] feat: git tooling for undo (#3914)
- [#4082] fix: usage data tweaks (#4082)
- [#4075] Rate limits warning (#4075)

https://github.com/openai/codex/releases/tag/rust-v0.40.0

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