openai/gpt-5.1-codex-miniGPT-5.1-Codex-mini is OpenAI’s proprietary AI model, released Nov 12, 2025. It costs $0.25/M input and $2/M output tokens, and handles a 400K-token context window. Its strongest use case is math, where it ranks in the 63rd percentile of the models Model Beat tracks.
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
Scores on standardized evaluations. Higher is better — and rank shows where GPT-5.1-Codex-mini lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Broad expert knowledge
Contamination-free coding
Scientific research coding
Human-rated web development
Olympiad-qualifier math
Command-line agentic tasks
Tool-agent-user reliability
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
GPT-5.1-Codex-mini is an AI model developed by OpenAI, part of the GPT family, released Nov 12, 2025.
GPT-5.1-Codex-mini's list price from OpenAI is $0.25 per million input tokens and $2 per million output tokens.
GPT-5.1-Codex-mini supports a context window of up to 400K tokens.
On standardized evaluations tracked by Epoch AI, GPT-5.1-Codex-mini scores 61.6% on Terminal-Bench, 83.6% on LiveCodeBench, 91.7% on AIME 2024/2025.
GPT-5.1-Codex-mini is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Jul 30, 2026.