GPT-5.1-Codex vs o3
| GPT-5.1-Codex | o3 | |
|---|---|---|
| Coding index | 50.5 | 70.7 |
| Benchmarks behind it | Partial, 2 benchmarks | Partial, 2 benchmarks |
| Output $/Mtok | $10.00 | $8.00 |
| Cost per solved task | $0.892 | $0.571 |
| Context window | 400K | 200K |
| GPT-5.1-Codex | o3 | |
|---|---|---|
| Coding index | 50.5 | 70.7 |
| Benchmarks behind it | Partial, 2 benchmarks | Partial, 2 benchmarks |
| Output $/Mtok | $10.00 | $8.00 |
| Cost per solved task | $0.892 | $0.571 |
| Context window | 400K | 200K |