codex-1

Published

May 16, 2025

codex-1 is an AI model developed by OpenAI (United States), first published in May 2025. It works in the language domain, on tasks such as code generation.

Epoch AI has no training-compute estimate for this model.

Access: API access. Its weights are not openly released. It is built on top of o3.

Full record

Organization: OpenAI
Country of organization: United States
Domain: Language
Task: Code generation
Model accessibility: API access
Open weights: No
Base model: o3