Head to head
GPT-5.3 Codex vs Claude Sonnet 4.6
On a blended workload of one million input tokens and three million output tokens, GPT-5.3 Codex is 1.1× cheaper than Claude Sonnet 4.6.
| GPT-5.3 Codex | Claude Sonnet 4.6 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Input / MTok | $1.75 | $3 |
| Output / MTok | $14 | $15 |
| Cache read / MTok | $0.175 | $0.3 |
| Context window | — | 1,000,000 |
| Blended 1M in + 3M out | $43.75 | $48.00 |
| Status | ga | ga |