Model comparison
Gemini 3.1 Pro vs Grok 4.20
Gemini 3.1 Pro
Google's latest frontier model with expanded reasoning.
xAI
Grok 4.20
xAI's fourth-generation model with a 2M-token context window.
Specs
| Metric | Gemini 3.1 Pro | Grok 4.20 |
|---|---|---|
| Context window | 1.0M tokens | 2M tokens↑ |
| Input $/1M tokens | $2.00 | $1.25↑ |
| Output $/1M tokens | $12.00 | $2.50↑ |
| Modalities | Audio · File · Image · Text · Video | Text · Image · File |
| Open weights | No | No |
Capability differences
| Capability | Gemini 3.1 Pro | Grok 4.20 |
|---|---|---|
| Prompt caching | Yes | No |
Key differences
- -Gemini 3.1 Pro offers 1.0M context; Grok 4.20 offers 2M.
- -Input pricing: Gemini 3.1 Pro at $2.00/1M vs Grok 4.20 at $1.25/1M.