Model comparison
Grok 4.20 vs Claude Sonnet 4.6
xAI
Grok 4.20
xAI's fourth-generation model with a 2M-token context window.
Anthropic
Claude Sonnet 4.6
The pragmatic default - Claude quality without Opus pricing.
Specs
| Metric | Grok 4.20 | Claude Sonnet 4.6 |
|---|---|---|
| Context window | 2M tokens↑ | 1M tokens |
| Input $/1M tokens | $1.25↑ | $3.00 |
| Output $/1M tokens | $2.50↑ | $15.00 |
| Modalities | Text · Image · File | Text · Image · File |
| Open weights | No | No |
| Released | Mar 2026 | - |
Capability differences
| Capability | Grok 4.20 | Claude Sonnet 4.6 |
|---|---|---|
| Prompt caching | No | Yes |
Key differences
- -Grok 4.20 offers 2M context; Claude Sonnet 4.6 offers 1M.
- -Input pricing: Grok 4.20 at $1.25/1M vs Claude Sonnet 4.6 at $3.00/1M.