Claude Opus 5.5 vs GPT-5.2-Codex
| Claude Opus 5.5 | GPT-5.2-Codex | |
|---|---|---|
| Coding index | 92.2 | 55.1 |
| Benchmarks behind it | Partial, 2 benchmarks | Partial, 2 benchmarks |
| Output $/Mtok | $20.00 | $14.00 |
| Cost per solved task | Not computable | $0.43 |
| Context window | 1M | 400K |
| Claude Opus 5.5 | GPT-5.2-Codex | |
|---|---|---|
| Coding index | 92.2 | 55.1 |
| Benchmarks behind it | Partial, 2 benchmarks | Partial, 2 benchmarks |
| Output $/Mtok | $20.00 | $14.00 |
| Cost per solved task | Not computable | $0.43 |
| Context window | 1M | 400K |