Gemini 2.5 Pro vs GPT-5 Codex
Google vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5 Codex has the higher intelligence index (87.1 vs 71.6)
- •GPT-5 Codex is faster
- •Gemini 2.5 Pro has a larger context window (1M)
| Gemini 2.5 Pro | GPT-5 Codex | |
|---|---|---|
| Intelligence index | 71.6 | 87.1 |
| 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 | 180 tok/s |
| Released | March 25, 2025 | September 23, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image, Audio, Video | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
Gemini 2.5 Pro
GPT-5 Codex
AIME 2025
88
98.7
GPQA Diamond
84
83.7
Humanity’s Last Exam
17.8
25.6
LiveCodeBench
80.1
84
MMLU-Pro
86
86.5
SWE-bench Verified
63.8
74.5