OpenAI
GPT-5.2 Codex (xhigh)
GPT‑5.2-Codex is a version of GPT‑5.2 further optimized for agentic coding in Codex, including improvements on long-horizon work through context compaction, stronger performance on large code changes like refactors and migrations, improved performance in Windows environments, and significantly stronger cybersecurity capabilities.
Introducing GPT-5Model Snapshot
TypeLanguage
ReleaseDec 18, 2025
Context400,000
Tagsfile-input, implicit-caching, reasoning, tool-use
Overall
Rank #72 across 600
40.1
Coding
No rank
n/a
Blended Price
Rank #318 across 379
$4.81/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$4.81/M
Input$1.75/M
Output$14.00/M
Catalog$1.75/M in / $14.00/M out
Metadata
Modalities
All Benchmarks
| Metric | Domain | Value | Rank |
|---|---|---|---|
| Artificial Analysis Intelligence Index | overall | 40.1 | #72 |
| LiveBench Mathematics | math | 88.8% | #13 |
| GPQA | reasoning | 89.9% | #38 |
| Humanity's Last Exam | reasoning | 33.5% | #48 |
| SciCode |