Claude-Sonnet-4 vs GPT-5.1-Codex
GPT-5.1-Codex is cheaper on output tokens, while Claude-Sonnet-4 offers a larger context window. Choose Claude-Sonnet-4 or GPT-5.1-Codex based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude-Sonnet-4 | GPT-5.1-Codex |
|---|---|---|
| Provider | Poe | Poe |
| Input / 1M tokens | $2.60 | $1.10 |
| Output / 1M tokens | $13.00 | $9.00 |
| Context window | 983K | 400K |
| Parameters | — | — |
| Open weights | No | No |
| Released | May 2025 | Nov 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.