OpenAI Codex rust-v0.166.0

OpenAI Codex 0.166.0 adds keyboard-driven transcript selection and search in the terminal UI, puts GPT-6.1 Terra in the bundled, Vertex AI and Amazon Bedrock model catalogs, and adds codex queue --resume and codex doctor --network-only.

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Paid (via ChatGPT plan or API)Apache-2.0Rust★ 131,660 (as of 2026-10-30)by OpenAI

Why it matters

For developers using OpenAI's Codex coding agent in the terminal or app server. It makes long transcripts easier to navigate and copy from, brings the newest OpenAI model to cloud-hosted setups, and fixes several resume and fork bugs that could drop settings or context.

What's new

Keyboard-driven transcript selection with word, line and page motions, built-in search and configurable shortcuts.
GPT-6.1 Terra added to the bundled, Vertex AI and Amazon Bedrock model catalogs.
New codex queue --resume resumes unloaded threads after queueing a message; codex doctor --network-only runs focused config, connectivity and WebSocket checks.
The TUI now explains safety blocks more clearly and offers safer follow-up prompts you can pick.
Fixes: approval and permission settings and reasoning-token accounting are kept on resume and fork, and spawned child threads come back when their parent is unarchived.

Taken from the project's own release notes. Claims about speed or accuracy are the maker's unless stated otherwise.

Try it if: You scroll back through long Codex sessions to copy output, or run Codex through Vertex AI or Bedrock and want GPT-6.1 Terra.

Quick facts

Pricing	Included with ChatGPT Plus, Pro, Business, Edu and Enterprise plans, or use an API keynot verified
Free or paid	Paid (via ChatGPT plan or API)
License	Apache-2.0
Language	Rust
Platform	macOS, Linux, Windows; CLI, IDE extension, desktop appnot verified
GitHub stars	★ 131,660 (as of 2026-10-30)
Maker	OpenAI

Related ranking

See how established tools compare in Best AI Coding Tools for Developers. New releases aren't scored until we review them against the rubric.

What we couldn't verify

quick_facts.pricing (plan list carried from earlier releases)
quick_facts.platform (carried from earlier releases)

Checked 2026-10-30 from the release notes's own pages. Prices and star counts change, so confirm on the official site. Listing here is not a ranking or an endorsement.