Codex
OpenAI's Rust-based CLI for interacting with the Codex model.
✨ New Features
>Introducing our new model GPT-5-Codex-Mini — a more compact and cost-efficient version of GPT-5-Codex
>#6212 [app-server] feat: export.rs supports a v2 namespace, initial v2
>#6237 Add modelReasoningEffort option to TypeScript SDK
>#6214 [app-server] feat: v2 Thread APIs
>#6183 [App-server] Implement v2 for account/login/start and account/login/completed
>#6288 [App-server] Add account/login/cancel v2 endpoint
>#6286 feat: add model nudge for queries
>#6300 feat: support models with single reasoning effort
>#6216 [app-server] feat: v2 Turn APIs
>#6333 feat: clarify that gpt-5-codex should not amend commits unless requested
>#6337 [App Server] Add more session metadata to listConversations
🚀 Improvements
>#4200 allow codex to be run from pid 1
>#6234 Upgrade rmcp to 0.8.4
>#5565 tui: refactor ChatWidget and BottomPane to use Renderables
>#6229 refactor Conversation history file into its own directory
>#6231 Improved token refresh handling to address “Re-connecting” behavior
>#6261 Update rmcp to 0.8.5
>#6283 Windows Sandbox: Show Everyone-writable directory warning
>#5980 core: widen sandbox to allow certificate ops when network is enabled
🐛 Bug Fixes
>#6211 fix: Update the deprecation message to link to the docs
>#6230 Fix nix build
>#3643 fix(core): load custom prompts from symlinked Markdown files
>#6282 Fixes intermittent test failures in CI
>#6249 stop capturing r when environment selection modal is open
>#6285 Prevent dismissal of login menu in TUI
>#4388 fix: ToC so it doesn’t include itself or duplicate the end marker