Claude Opus 5.5 vs GPT-5 Chat
GPT-5 Chat is cheaper on output tokens, while Claude Opus 5.5 offers a larger context window. Choose Claude Opus 5.5 or GPT-5 Chat based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Opus 5.5 | GPT-5 Chat |
|---|---|---|
| Provider | Azure | Azure |
| Input / 1M tokens | $4.00 | $1.25 |
| Output / 1M tokens | $20.00 | $10.00 |
| Context window | 1M | 128K |
| 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.