Claude Opus 5.5 vs Grok Code Fast 1
Grok Code Fast 1 is cheaper on output tokens, while Claude Opus 5.5 offers a larger context window. Choose Claude Opus 5.5 or Grok Code Fast 1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Opus 5.5 | Grok Code Fast 1 |
|---|---|---|
| Provider | ZenMux | ZenMux |
| Input / 1M tokens | $4.00 | $0.20 |
| Output / 1M tokens | $20.00 | $1.50 |
| Context window | 1M | 256K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Sep 2026 | Aug 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.