Grok Code Fast 1 vs GPT-5.1
Grok Code Fast 1 is cheaper on output tokens, while GPT-5.1 offers a larger context window. Choose Grok Code Fast 1 or GPT-5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Grok Code Fast 1 | GPT-5.1 |
|---|---|---|
| Provider | OpenCode Zen | OpenCode Zen |
| Input / 1M tokens | $0.00 | $1.07 |
| Output / 1M tokens | $0.00 | $8.50 |
| Context window | 256K | 400K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Aug 2025 | Nov 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.