Gemini 2.5 Pro Preview 06-05 vs GPT-5.1-Codex
Google vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1-Codex has the higher intelligence index (88.2 vs 76.6)
- •GPT-5.1-Codex is faster
- •Gemini 2.5 Pro Preview 06-05 has a larger context window (1M)
| Gemini 2.5 Pro Preview 06-05 | GPT-5.1-Codex | |
|---|---|---|
| Intelligence index | 76.6 | 88.2 |
| Developer | OpenAI | |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 1,048,576 tokens | 400,000 tokens |
| Input price | $1.25 / 1M | $1.25 / 1M |
| Output price | $10.00 / 1M | $10.00 / 1M |
| Speed | 85 tok/s | 188 tok/s |
| Released | June 5, 2025 | November 13, 2025 |
| Parameters | — | — |
| Input modalities | — | Text, Image |
| Output modalities | — | Text |
Shared benchmarks
Gemini 2.5 Pro Preview 06-05
GPT-5.1-Codex
AIME 2025
88
95.7
GPQA Diamond
86.4
86
Humanity’s Last Exam
21.6
23.4
LiveCodeBench
69
84.9