Model comparison
Gemini 3.1 Pro vs o3
Gemini 3.1 Pro
Google's latest frontier model with expanded reasoning.
OpenAI
o3
OpenAI's mainstream reasoning model - production-viable thinking.
Specs
| Metric | Gemini 3.1 Pro | o3 |
|---|---|---|
| Context window | 1.0M tokens↑ | 200K tokens |
| Input $/1M tokens | $2.00↑ | $2.00 |
| Output $/1M tokens | $12.00 | $8.00↑ |
| Modalities | Audio · File · Image · Text · Video | Image · Text · File |
| Open weights | No | No |
| Released | Feb 2026 | Apr 2025 |
Capability differences
| Capability | Gemini 3.1 Pro | o3 |
|---|---|---|
| Vision | Yes | No |
| Prompt caching | Yes | No |
Key differences
- -Gemini 3.1 Pro offers 1.0M context; o3 offers 200K.