Compare Models
GPT 5.1 Codex

Release Date: Nov 13, 2025

Developer OpenAI 🇺🇸
Context Window 400k
Max Output Tokens 128k
Token Costs (in/out) $1.25/10.00
Weights Private
Input Modalities

Accuracy

49.33 %

Avg. Cost (In/Out)

$ 1.25 / $ 10.00

Latency

27 min 10 s

Vals Index
BenchmarksAccuracyRankings
Vibe Code Bench v1.1

0.0%

±3.16
75/95
LiveCodeBench

0.0%

±1.00
31/143
Proprietary BenchmarksAcademic BenchmarksIndustry Partners
Vals
Default Provider : OpenAI
Temperature: Default
Top P: Default
Top K: Default
Max Output Tokens: 128,000
Reasoning Effort: high