Gemini 3 Deep Think vs GPT-5.2-Codex
Google vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.2-Codex has the higher intelligence index (89.9 vs 69.5)
- •Gemini 3 Deep Think is cheaper ($0.00 vs $1.75 per 1M input)
- •Gemini 3 Deep Think has a larger context window (1M)
| Gemini 3 Deep Think | GPT-5.2-Codex | |
|---|---|---|
| Intelligence index | 69.5 | 89.9 |
| Developer | OpenAI | |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 1,000,000 tokens | 400,000 tokens |
| Input price | $0.00 / 1M | $1.75 / 1M |
| Output price | $0.00 / 1M | $14.00 / 1M |
| Speed | — | 106 tok/s |
| Released | November 18, 2025 | January 14, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image, Audio, Video | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
Gemini 3 Deep Think
GPT-5.2-Codex
GPQA Diamond
93.8
89.9
Humanity’s Last Exam
41
33.5