GPT-5.1 Codex Max
Updated Sep 11, 2026
gpt-codex400k context128k max outputreleased Nov 13, 2025ReasoningTool calling
Official
—
output per 1M tokens
Providers
13
offering this model
Spread
2.2×
max / min output
Offers
Metered per-token prices. Cheapest input and output are highlighted; † marks a context-tier surcharge.
| Provider | 1M input | 1M output | 1M cache read | 1M cache write | Context |
|---|---|---|---|---|---|
| Poe | Cheapest$1.1 | Cheapest$9 | $0.11 | — | 400k |
| Jiekou.AI | $1.125 | $9 | — | — | 400k |
| Abacus | $1.25 | $10 | — | — | 400k |
| Azure | $1.25 | $10 | $0.125 | — | 400k |
| DigitalOcean | $1.25 | $10 | $0.125 | — | 400k |
| Eden AI | $1.25 | $10 | $0.125 | — | 272k |
| Kilo Gateway | $1.25 | $10 | $0.125 | — | 400k |
| Ofox | $1.25 | $10 | $0.13 | — | 256k |
| OpenCode Zen | $1.25 | $10 | $0.125 | — | 400k |
| OpenRouter | $1.25 | $10 | $0.125 | — | 400k |
| Vercel AI Gateway | $1.25 | $10 | $0.125 | — | 400k |
| Vivgrid | $1.25 | $10 | $0.125 | — | 400k |
| NanoGPT | $2.5 | $20 | $0.25 | — | 400k |