Gemini 3.1 Flash Lite 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 82.2)
- •Gemini 3.1 Flash Lite is cheaper ($0.25 vs $1.75 per 1M input)
- •Gemini 3.1 Flash Lite is faster
- •Gemini 3.1 Flash Lite has a larger context window (1M)
| Gemini 3.1 Flash Lite | GPT-5.2-Codex | |
|---|---|---|
| Intelligence index | 82.2 | 89.9 |
| Developer | OpenAI | |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 1,048,576 tokens | 400,000 tokens |
| Input price | $0.25 / 1M | $1.75 / 1M |
| Output price | $1.50 / 1M | $14.00 / 1M |
| Speed | 342 tok/s | 106 tok/s |
| Released | May 7, 2026 | January 14, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image, Video, Audio | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
Gemini 3.1 Flash Lite
GPT-5.2-Codex
GPQA Diamond
82.2
89.9
Humanity’s Last Exam
16.2
33.5