Head to head
GPT-5.1 vs Claude Sonnet 5
On a blended workload of one million input tokens and three million output tokens, GPT-5.1 is 1.0× cheaper than Claude Sonnet 5.
| GPT-5.1 | Claude Sonnet 5 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Input / MTok | $1.25 | $2 |
| Output / MTok | $10 | $10 |
| Cache read / MTok | $0.125 | $0.2 |
| Context window | — | 1,000,000 |
| Blended 1M in + 3M out | $31.25 | $32.00 |
| Status | ga | ga |