Artificial Analysis · Intelligence IndexBenchmarks, as Artificial Analysis ran them- 86%GPQA Diamond
- 26%Humanity's Last Exam
- 35%Terminal-Bench Hard
- 85%LiveCodeBench
- 96%AIME 2025
- 83%τ²-Bench
- 86%MMLU-Pro
- 70%IFBench
- 69%Long context reasoning
- Per 1M tokens
- $1.25 in · $10.00 out
- Context
- 400K tokens
Against list priceRating for the price
GPT-5.1-Codex · 1,337 · $3.44 per 1M tokens ($1.25 in, $10.00 out) · 400K context
GPT-5.1-Codex · 1,337 · $3.44 per 1M tokens ($1.25 in, $10.00 out) · 400K context
LMArena, CC BY 4.0, 19 October 2026 · prices OpenRouter, list price blended 3:1, read 22 October 2026 · Artificial Analysis, read 22 October 2026
GPT-5.1-Codex