GPT-5.2 Pro
GPT-5.2 Pro is an API-only (closed weights) language model from OpenAI, released December 11, 2025. The context window is 391K tokens. On the Epoch Capabilities Index it scores 157.3, rank 31 of 256 rated models. API price: $21 input / $168 output per million tokens.
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Lab
OpenAI
Released
December 11, 2025
Weights
API-only (closed weights)
Parameters
–
Context
391K
Price / M tokens
$21 / $168 in / out
Epoch ECI
157.3 #31
Strengths by category
ModelTape's 0–100 fit on Epoch AI benchmark results.
| Category | Score | Based on |
|---|---|---|
| Reasoning | 26.0 | Chess Puzzles, SimpleBench |
| Math | 55.6 | FrontierMath-Tiers-1-3-v2-Private, FrontierMath-Tier-4-v2-Private |
Benchmark results
| Benchmark (Epoch AI) | Score |
|---|---|
| FrontierMath (Tiers 1–3) | 77.9% |
| Chess Puzzles | 57.9% |
| SimpleBench | 48.9% |
| FrontierMath-Tier-4-v2-Private | 46.0% |
Links
Announcement · Epoch AI benchmarks
Models with a similar score
GPT-5.6 Terra · Claude Haiku 5.5 · GPT-5.4 Pro · GPT-5.5 · Claude Opus 4.8 · DeepSeek V4.1 Flash 1017 · Gemini 3.8 Flash · Kimi K3
More from OpenAI
GPT-6.1 Terra · GPT-6.1 Sol · GPT-6 Sol · GPT-6 Luna · GPT-6 Astra · GPT-5.6 Cyber · Daybreak Red · Daybreak Blue