Claude Opus 5.5 vs grok-4-1-fast-reasoning
grok-4-1-fast-reasoning is cheaper on output tokens, while grok-4-1-fast-reasoning offers a larger context window. Choose Claude Opus 5.5 or grok-4-1-fast-reasoning based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Opus 5.5 | grok-4-1-fast-reasoning |
|---|---|---|
| Provider | 302.AI | 302.AI |
| Input / 1M tokens | $4.00 | $0.20 |
| Output / 1M tokens | $20.00 | $0.50 |
| Context window | 1M | 2M |
| Parameters | — | — |
| Open weights | No | No |
| Released | Sep 2026 | Nov 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.