ToolOpenAICodex

OpenAI adds GPT-6.1 Terra to Codex

Original title: Codex 0.165.0

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What it is: OpenAI released Codex version 0.165.0. This update adds a built-in Google Cloud Vertex AI provider and includes the GPT-6.1 Terra model in the catalogs. It also improves session navigation and enables memory v2 by default for new profiles.
How it works: Users can navigate sessions across linked worktrees using a new repository filter and directory grouping. Additionally, supported models now allow changing the reasoning effort during a conversation by default.
Where it is available: These updates apply to Codex version 0.165.0, including the session picker, the agent command center, and new user profiles.
Example: A user can import memories from an external agent into the new memory v2 system.

What it is: Codex version 0.165.0 has been released. It introduces a built-in Google Cloud Vertex AI provider, adds GPT-6.1 Terra to the model catalogs, and enables memory v2 by default for fresh profiles.
How it works: The Google Cloud Vertex AI provider is configured using model_provider = "gcp". The release also enables reasoning effort overrides during a conversation by default and adds experimental attached thread forks to the app-server API.
Where it is available: These features are available in Codex version 0.165.0, affecting the app-server API, model catalogs, and the TUI session picker.
Example: A developer can configure the built-in Google Cloud Vertex AI provider by setting the parameter model_provider = "gcp".

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

Codex 0.165.0