OpenAI
GPT-5.1 Codex (high)
GPT-5.1-Codex is a version of GPT-5.1 optimized for agentic coding tasks in Codex or similar environments.
Introducing GPT-5Model Snapshot
TypeLanguage
ReleaseNov 12, 2025
Context400,000
Tagsfile-input, implicit-caching, reasoning, tool-use
Overall
Rank #115 across 600
34.7
Coding
No rank
n/a
Blended Price
Rank #286 across 379
$3.44/M
Strength Profile
Percentile score by analysis domain.
* Cost is inverted: lower input, output, and blended prices rank higher.
Benchmark Percentiles
Higher bars mean stronger relative placement.
Model Details
Runtime
Max Output128,000
Streaming speed is not measured for this model yet.
Pricing
Blended$3.44/M
Input$1.25/M
Output$10.00/M
Catalog$1.25/M in / $10.00/M out
Metadata
Modalities
All Benchmarks
| Metric | Domain | Value | Rank |
|---|---|---|---|
| Artificial Analysis Intelligence Index | overall | 34.7 | #115 |
| Artificial Analysis Math Index | math | 95.7 | #8 |
| MMLU-Pro | reasoning | 86.0% | #24 |
| GPQA | reasoning | 86.0% | #85 |
| Humanity's Last Exam |