Codex 0.165.0 now includes a built-in Google Cloud Vertex AI provider, selectable with model_provider="gcp". The model catalog adds the new GPT-6.1 Terra model for higher-quality completions. Session picker gains a repository filter and directory grouping, simplifying navigation across linked worktrees. Memory v2 is enabled by default for new profiles and you can import external-agent memories into it. The app-server API now supports experimental attached thread forks, allowing parallel conversation branches.