OpenAI Codex updates from the official changelog
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This page tracks OpenAI Codex updates from the official Codex changelog. The table paraphrases a few notable October 2026 entries and leaves bug fixes and the rest of the changelog to OpenAI.
Status: Not tested. We paraphrase official notes only and did not run a product test. Sources checked on 2026-10-30.
These rows paraphrase notable items from the Codex changelog. Dates are the changelog's own. Bug fixes are left out. Nothing here is a result from a run on our side.
| Date | Version | What the changelog says |
|---|---|---|
| 2026-10-29 | Codex CLI 0.166.0 | The changelog says this release adds keyboard-driven transcript selection, renders Markdown in async questions, adds GPT-6.1 Terra to the bundled, Vertex AI and Amazon Bedrock catalogs, adds codex queue --resume, and adds codex doctor --network-only. |
| 2026-10-27 | Codex CLI 0.165.0 | The changelog says this release adds a built-in Google Cloud Vertex AI provider, set with model_provider = "gcp", adds GPT-6.1 Terra to the model catalogs, and adds a repository filter in the session picker. It says reasoning-effort changes during a conversation are on by default, and memory v2 is on by default for fresh profiles. |
| 2026-10-26 | GPT-6.1 Terra in Work and Codex | The changelog says GPT-6.1 Terra is available in ChatGPT Work and Codex on Plus, Pro, Business, Enterprise and Edu plans. It says the model is not available in Chat, and that it does not support UAE inference residency. |
| 2026-10-23 | Codex CLI 0.164.0 | The changelog says this release adds /presets, inline /model and /permissions arguments, and image preview in the fullscreen transcript on terminals that support Kitty or Sixel graphics. It says enterprise MCP connections can sign in with an eligible Codex account or a dedicated sign-in. It says the Amazon Bedrock setup wizard is on by default. |
| 2026-10-14 | GPT-5.5 retirement in Codex | The changelog says that at noon PDT, GPT-5.5 retires from Codex for people signed in with ChatGPT. It says Codex sessions authenticated with an API key are not affected, and the OpenAI API is not affected. |
The 29 October and 27 October CLI notes both mention GPT-6.1 Terra in model catalogs. The 26 October note is the product availability line for Work and Codex, separate from those CLI releases. This page keeps them as three changelog entries.
FAQ
Where is the official Codex changelog?
OpenAI publishes it at the Codex changelog linked in Sources. This page paraphrases notable entries from the copy we read on 2026-10-30. It is not the changelog.
Is this a test log?
No. We did not run these Codex releases. The status above is Not tested, and each row says what the changelog says.
How often is this page updated?
We check the official changelog on a daily maintenance pass and add a row when there is a notable change. The Updated date and the sources-checked date move when we change the page.
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Sources: OpenAI Codex changelog. Checked on 2026-10-30.