GPT-5 Pro
GPT-5 Pro is an API-only (closed weights) language model from OpenAI, released October 7, 2025. The context window is 391K tokens. On the Epoch Capabilities Index it scores 151.2, rank 63 of 256 rated models. API price: $15 input / $120 output per million tokens.
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Lab
OpenAI
Released
October 7, 2025
Weights
API-only (closed weights)
Parameters
–
Context
391K
Price / M tokens
$15 / $120 in / out
Epoch ECI
151.2 #63
Strengths by category
ModelTape's 0–100 fit on Epoch AI benchmark results.
| Category | Score | Based on |
|---|---|---|
| Reasoning | 24.7 | Chess Puzzles, SimpleBench, Humanity's Last Exam |
| Math | 40.1 | FrontierMath-Tiers-1-3-v2-Private, FrontierMath-Tier-4-v2-Private |
Benchmark results
| Benchmark (Epoch AI) | Score |
|---|---|
| FrontierMath (Tiers 1–3) | 58.7% |
| SimpleBench | 53.9% |
| Chess Puzzles | 45.3% |
| Humanity's Last Exam | 31.6% |
| FrontierMath-Tier-4-v2-Private | 19.5% |
Links
Announcement · Epoch AI benchmarks
Models with a similar score
Gemini 3.6 Flash · Muse Spark 1.2 · Grok 4.5 · Muse Spark 1.1 · Mistral Large 4 · Qwen3.7-Max · GPT-5.2 · DeepSeek V4 Flash 0731
More from OpenAI
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