Model comparison
o3 vs Gemini 3.1 Pro
OpenAI
o3
OpenAI's mainstream reasoning model - production-viable thinking.
Gemini 3.1 Pro
Google's latest frontier model with expanded reasoning.
Specs
| Metric | o3 | Gemini 3.1 Pro |
|---|---|---|
| Context window | 200K tokens | 1.0M tokens↑ |
| Input $/1M tokens | $2.00↑ | $2.00 |
| Output $/1M tokens | $8.00↑ | $12.00 |
| Modalities | Image · Text · File | Audio · File · Image · Text · Video |
| Open weights | No | No |
Capability differences
| Capability | o3 | Gemini 3.1 Pro |
|---|---|---|
| Vision | No | Yes |
| Prompt caching | No | Yes |
Key differences
- -o3 offers 200K context; Gemini 3.1 Pro offers 1.0M.