Model comparison
Gemini 3.1 Pro vs Grok 3
Gemini 3.1 Pro
Google's latest frontier model with expanded reasoning.
xAI
Grok 3
xAI's third-generation model - superseded by Grok 4.
Specs
| Metric | Gemini 3.1 Pro | Grok 3 |
|---|---|---|
| Context window | 1.0M tokens↑ | 131K tokens |
| Input $/1M tokens | $2.00↑ | $3.00 |
| Output $/1M tokens | $12.00↑ | $15.00 |
| Modalities | Audio · File · Image · Text · Video | Text |
| Open weights | No | No |
| Released | Feb 2026 | - |
Capability differences
| Capability | Gemini 3.1 Pro | Grok 3 |
|---|---|---|
| Prompt caching | Yes | No |
Key differences
- -Gemini 3.1 Pro offers 1.0M context; Grok 3 offers 131K.
- -Input pricing: Gemini 3.1 Pro at $2.00/1M vs Grok 3 at $3.00/1M.