codex-1
OpenAI's o3-derived software-engineering model powering the May 2025 cloud Codex research preview.
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Why this model scores 77.1
Repository-scale code changes, tool execution and iterative testing create high practical autonomy. Preview access, isolated sandboxes and review controls limit deployment and residual control difficulty.
News tied to codex-1
The model score of 77.1 rates this model's risk profile. The overall Doom Index of 67.9 measures the complete temporally weighted evidence record. These values answer different questions.
Each article's current Doom Index contribution is divided equally among the exact models named on that article. This prevents multi-model evidence from being claimed in full on several model pages. Model risk scores use a bounded temporal offset around their technical profile, but never feed back into the overall index.
OpenAI launches cloud Codex software-engineering agent
OpenAI launched Codex as a research preview powered by codex-1, able to edit repositories, run tests, complete multiple software tasks in parallel and prepare commits for human review.
- Full item contribution
- +0.14
- codex-1 equal share
- +0.14
Model score history
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R4
Doom Score 77.1
Source-backed model availability audit using the model's existing primary or authoritative catalogue evidence. Exact-version evidence chronology replayed under temporal-monthly-pressure-v4.
12 Aug 2026 -
R3
Doom Score 77.1
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-142416 under temporal-monthly-pressure-v4.
12 Aug 2026 -
R2
Doom Score 77.2
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-132112 under fixed-sensitivity-v3.
12 Aug 2026 -
R1
Doom Score 77.7
Initial exact profile for codex-1.
12 Aug 2026