Claude Opus 4.5 vs GPT-5.2-Codex
| Claude Opus 4.5 | GPT-5.2-Codex | |
|---|---|---|
| Coding index | 44.0 | 45.4 |
| Benchmarks behind it | Verified, 3 benchmarks | Verified, 3 benchmarks |
| Output $/Mtok | $25.00 | $14.00 |
| Cost per solved task | $1.37 | $0.43 |
| Context window | 200K | 400K |
| Claude Opus 4.5 | GPT-5.2-Codex | |
|---|---|---|
| Coding index | 44.0 | 45.4 |
| Benchmarks behind it | Verified, 3 benchmarks | Verified, 3 benchmarks |
| Output $/Mtok | $25.00 | $14.00 |
| Cost per solved task | $1.37 | $0.43 |
| Context window | 200K | 400K |