Claude 4.6 Sonnet vs Grok 4
Direct spec comparison of Claude 4.6 Sonnet (from Anthropic) and Grok 4 (from xAI). Want a 3- or 4-way comparison? Open the multi-model tool →
 Claude 4.6 SonnetAnthropic |  Grok 4xAI | |
|---|---|---|
| Vendor | Anthropic | xAI |
| Family | Claude | Grok |
| Release date | 2026-02-17 | 2025-07-09 |
| Context window | 1,000,000 tokens | 256,000 tokens |
| Parameters | — | — |
| Modality | text, vision | text |
| License | proprietary | proprietary |
| Source | proprietary | proprietary |
| Description | Anthropic's mid-tier flagship — released 12 days after Opus 4.6 and matching most of its capabilities at ~40% the API cost ($3/$15 per 1M tokens). 1M-token context. | — |
| Links | ||
| Benchmarks | ||
| MMLU-Pro | 85.4% | 82.8% |
| GPQA-D | 85.8% | 87.5% |
| HumanEval | 95.9% | — |
| Aider | 83.6% | 72.5% |
| AIME-25 | 87.4% | 86.1% |
| LiveCB | 73.8% | 65.3% |
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