GPT-5 vs GPT-5.1
OpenAI vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 80.5)
- •GPT-5.1 is faster
| GPT-5 | GPT-5.1 | |
|---|---|---|
| Intelligence index | 80.5 | 89 |
| Developer | OpenAI | OpenAI |
| Type | LLM | LLM |
| Access | API only | API only |
| Context window | 400,000 tokens | 400,000 tokens |
| Input price | $1.25 / 1M | $1.25 / 1M |
| Output price | $10.00 / 1M | $10.00 / 1M |
| Speed | 100 tok/s | 115 tok/s |
| Released | August 7, 2025 | November 12, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
GPT-5
GPT-5.1
AIME 2025
94.6
94
GPQA Diamond
87.3
88.1
Humanity’s Last Exam
24.8
26.5
LiveCodeBench
84.6
86.8
MMLU-Pro
87.1
87