GPT-5.1-Codex-mini

Published

Nov 12, 2025

GPT-5.1-Codex-mini is an AI model developed by OpenAI (United States), first published in November 2025. It works in the language and multimodal domain, on tasks such as language modeling/generation.

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

Access: API access. Its weights are not openly released.

Full record

Organization: OpenAI
Country of organization: United States
Domain: Language, Multimodal
Task: Language modeling/generation
Model accessibility: API access
Open weights: No

Benchmark results

01	WebDev Arena	Arena Score	1247
02	Terminal-Bench	Accuracy mean	0.62