Codex vs Gemini 3.5 Flash
OpenAI vs Google — benchmarks, pricing, and capabilities side by side.
| Codex | Gemini 3.5 Flash | |
|---|---|---|
| Intelligence index | — | 92.2 |
| Developer | OpenAI | |
| Type | LLM | Multimodal |
| Access | API only | API only |
| Context window | — | 1,048,576 tokens |
| Input price | — | $1.50 / 1M |
| Output price | — | $9.00 / 1M |
| Speed | — | 221 tok/s |
| Released | August 10, 2021 | May 19, 2026 |
| Parameters | — | — |
| Input modalities | Text | Text, Image, Audio, Video |
| Output modalities | Text | Text |