Claude Opus 5.5 vs Grok 4.1 Fast
30-second takeaway
- Grok 4.1 Fast has the cheaper input: $0.2 vs $4 (per 1M tokens, 95% less)
- Grok 4.1 Fast has the larger context: 2M vs 1M tokens
| Claude Opus 5.5 AI/ML API | Grok 4.1 Fast Ofox | |
|---|---|---|
| Input | $4 | $0.2 |
| Output | $20 | $0.5 |
| Context | 1M | 2M |
More specs (max output / capabilities)
| max output | 128,000 | 30,000 |
| Reasoning | ✓ Yes | — No |
| Tool calls | ✓ Yes | ✓ Yes |
| Open weights | — No | — No |
Prices are official/data-source rates (per 1M tokens), not what relays actually charge — relay prices vary with discounts and group multipliers. See methodology.