Codex-12B
A 12-billion-parameter GPT model fine-tuned on public GitHub code for generating and completing computer programs.
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Why this model scores 25.2
Codex-12B showed material code-generation breadth but remained a research checkpoint with low independent agency and limited direct deployment. Code generation creates meaningful misuse and control concerns without implying the distinct production Copilot checkpoint was this exact model.
News tied to Codex-12B
The model score of 25.2 rates this model's risk profile. The overall Doom Index of 66.8 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 publishes Codex-12B and documents practical coding deployment
OpenAI published Codex-12B as a GPT language model fine-tuned on public GitHub code and documented that a distinct production Codex checkpoint powered GitHub Copilot's coding assistant.
- Full item contribution
- +0.03
- Codex-12B equal share
- +0.03
Model score history
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R4
Doom Score 25.2
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 25.2
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-142416 under temporal-monthly-pressure-v4.
12 Aug 2026 -
R2
Doom Score 27.8
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-132112 under fixed-sensitivity-v3.
12 Aug 2026 -
R1
Doom Score 31.0
New exact public research model absent from the durable catalogue.
12 Aug 2026