GPT-5.1 Codex Max vs Large
30-second takeaway
- GPT-5.1 Codex Max has the cheaper input: $1.25 vs $2.116 (per 1M tokens, 41% less)
- GPT-5.1 Codex Max has the larger context: 400K vs 128K tokens
| GPT-5.1 Codex Max Abacus | Large AI/ML API | |
|---|---|---|
| Input | $1.25 | $2.116 |
| Output | $10 | $6.348 |
| Context | 400K | 128K |
More specs (max output / capabilities)
| max output | 128,000 | 102,400 |
| 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.