Head to head
GPT-5.4 vs Claude Sonnet 4.5
On a blended workload of one million input tokens and three million output tokens, GPT-5.4 is line-ball with Claude Sonnet 4.5.
| GPT-5.4 | Claude Sonnet 4.5 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Input / MTok | $2.5 | $3 |
| Output / MTok | $15 | $15 |
| Cache read / MTok | $0.25 | $0.3 |
| Context window | — | 200,000 |
| Blended 1M in + 3M out | $47.50 | $48.00 |
| Status | ga | ga |