Benchmark Hub

GPT-5.1-Codex

OpenAI · openai/gpt-5.1-codex

← Back to leaderboard

GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....

imagetexttext+image->text

Context

Max context: 400000
Max output: 128000

Pricing

Input / 1M: 1.25
Output / 1M: 10.00
Blend / 1M: 5.63

Quality

Quality index: —
Arena unavailable: All LMArena fetches failed: text: LMArena text snapshot request failed: 429 Too Many Requests; text@2026-07-23: LMArena text-2026-07-23 snapshot request failed: 429 Too Many Requests; text@2026-07-16: LMArena text-2026-07-16 snapshot request failed: 429 Too Many Requests; text@2026-07-09: LMArena text-2026-07-09 snapshot request failed: 429 Too Many Requests; code: LMArena code snapshot request failed: 429 Too Many Requests; code@2026-07-23: LMArena code-2026-07-23 snapshot request failed: 429 Too Many Requests; code@2026-07-16: LMArena code-2026-07-16 snapshot request failed: 429 Too Many Requests; code@2026-07-09: LMArena code-2026-07-09 snapshot request failed: 429 Too Many Requests; vision: LMArena vision snapshot request failed: 429 Too Many Requests; vision@2026-07-23: LMArena vision-2026-07-23 snapshot request failed: 429 Too Many Requests; vision@2026-07-16: LMArena vision-2026-07-16 snapshot request failed: 429 Too Many Requests; vision@2026-07-09: LMArena vision-2026-07-09 snapshot request failed: 429 Too Many Requests; document: LMArena document snapshot request failed: 429 Too Many Requests; document@2026-07-23: LMArena document-2026-07-23 snapshot request failed: 429 Too Many Requests; document@2026-07-16: LMArena document-2026-07-16 snapshot request failed: 429 Too Many Requests; document@2026-07-09: LMArena document-2026-07-09 snapshot request failed: 429 Too Many Requests; search: LMArena search snapshot request failed: 429 Too Many Requests; search@2026-07-23: LMArena search-2026-07-23 snapshot request failed: 429 Too Many Requests; search@2026-07-16: LMArena search-2026-07-16 snapshot request failed: 429 Too Many Requests; search@2026-07-09: LMArena search-2026-07-09 snapshot request failed: 429 Too Many Requests

Provider

Provider: OpenAI
Moderated: no