All comparisons
Codex 1 vs GPT-1
Side-by-side comparison of specifications, capabilities, and pricing.
| Released | 2025-05-16 | 2018-06-11 |
| Context window | 192K | 512 |
| Parameters | — | 120M |
| Architecture | decoder only | decoder only |
| License | Proprietary | Unknown |
| Knowledge cutoff | — | — |
Capabilities | ||
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| JSON mode | ||
| Code execution | ||
Availability | ||
| Providers | — | — |