Codex 0.161.0 Makes GPT-6.1 Sol the Default and Hides Daybreak
The 7 October 2026 Codex release defaults the bundled and Bedrock catalogs to GPT-6.1 Sol, and leaves Daybreak off unless a CLI flag is set.
Direct answer
Codex rust-v0.161.0, published 7 October 2026, makes GPT-6.1 Sol the default model in the bundled and Amazon Bedrock catalogs, and keeps Daybreak hidden unless cli_daybreak is enabled.
Codex rust-v0.161.0 was published on 7 October 2026 at 15:58:45Z. The first new feature says GPT-6.1 Sol is now the default model in the bundled catalog and in the Amazon Bedrock catalog. The changelog attributes those catalog edits to pull requests 49318 and 49339. A related line, pull request 49345, says Amazon Bedrock supports multi-agent V2 and Ultra reasoning on compatible models. Pull request 49813 says Bedrock Mantle also accepts AWS GovCloud regions.
The same notes draw a hard line around Daybreak. It is opt-in through --enable cli_daybreak or features.cli_daybreak=true. The page says daybreak=true alone is insufficient. By default, controls and indicators are hidden, /daybreak is unavailable, and automatic Cyber routing is omitted, including for saved Daybreak threads. Saved preferences stay intact. Opt-in routing, the notes say, requires an eligible ChatGPT sign-in, the OpenAI provider, and advertised model or program support.
A per-turn override that does not save
A separate feature lets a turn pick a Cyber access program with codex exec --cyber-access-program, or with the TypeScript SDK option cyberAccessProgram. The notes say that explicit exec override remains available even when cli_daybreak is disabled, and that it leaves the saved choice unchanged. The compare range on the page is rust-v0.160.0 to rust-v0.161.0.
Source: Codex rust-v0.161.0.
FAQ
- Does daybreak=true turn the feature on?
- The notes say no. Opt-in is --enable cli_daybreak or features.cli_daybreak=true. daybreak=true alone is insufficient.
- What Bedrock change shipped in the same release?
- The notes say Amazon Bedrock supports multi-agent V2 and Ultra reasoning on compatible models, and Bedrock Mantle accepts AWS GovCloud regions.