Model comparison
Claude Sonnet 4.6 vs Grok 4.20
Anthropic
Claude Sonnet 4.6
The pragmatic default - Claude quality without Opus pricing.
xAI
Grok 4.20
xAI's fourth-generation model with a 2M-token context window.
Specs
| Metric | Claude Sonnet 4.6 | Grok 4.20 |
|---|---|---|
| Context window | 1M tokens | 2M tokens↑ |
| Input $/1M tokens | $3.00 | $1.25↑ |
| Output $/1M tokens | $15.00 | $2.50↑ |
| Modalities | Text · Image · File | Text · Image · File |
| Open weights | No | No |
Capability differences
| Capability | Claude Sonnet 4.6 | Grok 4.20 |
|---|---|---|
| Prompt caching | Yes | No |
Key differences
- -Claude Sonnet 4.6 offers 1M context; Grok 4.20 offers 2M.
- -Input pricing: Claude Sonnet 4.6 at $3.00/1M vs Grok 4.20 at $1.25/1M.