ToolOpenAICodex

OpenAI Codex now supports GPT-6.1 Terra

Original title: Codex 0.166.0

Plain language

What it is: OpenAI released Codex version 0.166.0. This update adds new keyboard navigation features, consistent text formatting, and support for the GPT-6.1 Terra model.
How it works: Users can navigate transcripts using keyboard shortcuts and search. The update also improves safety explanations and reconnects more reliably when offline.
Where it is available: These updates apply to the Codex application, including its text-based interface, and model catalogs on Vertex AI and Amazon Bedrock.
Example: A user can use keyboard shortcuts to select words, lines, or pages within a transcript.

What it is: Codex version 0.166.0 has been released with keyboard-driven transcript selection, consistent Markdown rendering, and integration of the GPT-6.1 Terra model. It also introduces new CLI commands and diagnostic tools.
How it works: The release adds the codex queue --resume command to resume unloaded threads and codex doctor --network-only for WebSocket and connectivity diagnostics. It also standardizes builds on Node.js 24.22.1 and Rust 1.95.0.
Where it is available: The changes apply to the Codex CLI, the TUI, and model catalogs including Vertex AI and Amazon Bedrock.
Example: A developer can run codex doctor --network-only to perform focused configuration and network diagnostics.

The headline and explanation on this page are based on OpenAI's post. The full details are in the original.

Codex 0.166.0