GPT-5.4 vs GPT-4o
30-second takeaway
- Same input price ($2.5)
- GPT-5.4 has the larger context: 1.05M vs 128K tokens
More specs (max output / capabilities)
| max output | 128,000 | 16,384 |
| Reasoning | ✓ Yes | — No |
| Tool calls | ✓ Yes | ✓ Yes |
| Open weights | — No | — No |
Prices are official/data-source rates (per 1M tokens), not what relays actually charge — relay prices vary with discounts and group multipliers. See methodology.