Codex Updates & Release Notes

New Features

• GPT-6.1 Sol is now the default model in the bundled and Amazon Bedrock catalogs. (#49318, #49339)
• Amazon Bedrock supports multi-agent V2 and Ultra reasoning on compatible models; Bedrock Mantle also accepts AWS GovCloud regions. (#49345, #49813)
• Sign in to MCP servers from an active terminal session with /mcp login <name>. (#49290)
• Choose your microphone, speaker, and microphone input channels for voice conversations, with preferences saved locally. (#49437, #49836)
• Daybreak is opt-in through --enable cli_daybreak or features.cli_daybreak=true; daybreak=true alone is insufficient. By default, controls and indicators are hidden, /daybreak is unavailable, and automatic Cyber routing is omitted—even for saved Daybreak threads. Saved preferences remain intact. Opt-in routing requires eligible ChatGPT sign-in, the OpenAI provider, and advertised model/program support. (#49856, #49858, #49859, #49861, #51207)
• Select a Cyber access program per turn with codex exec --cyber-access-program or the TypeScript SDK’s cyberAccessProgram option. The explicit exec override remains available with cli_daybreak disabled and leaves the saved choice unchanged. (#49939, #51207)

Bug Fixes

• Approved filesystem escalation can now grant broader write access while preserving denied reads and network restrictions. Background tasks retain their originating turn’s permissions. (#49353, #49880) …

New Features

• Browse older tasks in the agent command center with a keyboard-accessible “Show more” action. (#49106)
• Select transcript text and paste with middle-click in fullscreen mode on supported local Linux X11 terminals. (#49112)
• Start sessions outside a project with workspace defaults when policy permits, and restore saved permissions when resuming. (#49160)
• Added opt-in Guardian review capabilities to retrieve earlier user instructions and include context from agent handoffs. (#49036, #49057)

Bug Fixes

• Unsent queued messages now resume after reconnection once uncertain submissions are resolved, avoiding duplicate sends. (#49105)
• The terminal UI now preserves server provider, reasoning-summary, and verbosity settings and shows the correct sessions in resume and fork history. (#49144, #49161, #49171)
• Fixed Windows sandbox PowerShell fallbacks and long-path permission repairs, and suppressed unwanted console windows from background helpers. (#49019, #49058, #49098, #49164, #49386)
• Subagents now retain environments that are still starting and receive their configuration or preparation failure. (#49075)
• Prevented SQLite stalls during connection setup and logging, and surfaced initialization errors instead of masking them as timeouts. (#49032, #49102)
• Explicit provider model catalogs no longer include unsupported bundled models or reuse stale entries after refresh failures. (#49135)

Documentation …