OpenAI Codex CLI 0.166.0: keyboard transcript selection, GPT-6.1 Terra in Vertex AI and Bedrock catalogs, codex doctor network checks

Background and pain point

Codex CLI is OpenAI's open-source terminal coding agent, and it ships pre-releases almost weekly. Day-to-day pain points include copying a precise slice of a long transcript, client model catalogs lagging behind new models on enterprise routes through Google Cloud or AWS, hard-to-debug network or proxy problems, and permission settings getting lost when threads are resumed or forked. The stable release rust-v0.166.0 on Oct 29 (the previous stable was 0.165.0) addresses these.

How it works

The TUI gains keyboard-driven transcript selection with word, line and page motions, built-in search and configurable shortcuts, and Markdown now renders consistently in async questions, choices, answers and transcript replies. On models, GPT-6.1 Terra joins the bundled, Vertex AI and Amazon Bedrock catalogs, and provider settings can now set a GCP project and location. New commands are codex queue --resume and codex doctor --network-only. When a request is blocked for safety, the TUI explains why and offers selectable safer follow-up prompts.

Benchmarks and results

This is a client update and OpenAI published no benchmarks or performance figures. For GPT-6.1 Terra's capabilities, refer to OpenAI's Oct 26 launch notes; this release only adds it to the client catalogs. Stability fixes include preserving reasoning-token accounting across resume and fork to avoid premature compaction, and fixing app-server thread startup and shutdown races.

Getting started

Upgrade to 0.166.0 through npm or Homebrew. If network or proxy calls fail, run codex doctor --network-only first. Teams on Bedrock or Vertex AI can pick GPT-6.1 Terra from the catalog and set their GCP project and location in provider config. The full change list is on the GitHub release page and the 0.165.0 to 0.166.0 compare view.