GPT-5.1 Codex Max
As of Oct 4, 2026, the cheapest GPT-5.1 Codex Max API price is $1 per 1M input tokens (Ofox) and $8 per 1M output tokens (Ofox). GPT-5.1 Codex Max is offered by 14 providers in the gpt-codex family, reasoning enabled.
API pricing by provider
Metered per-token prices. Cheapest input and output are highlighted; † marks a context-tier surcharge. How prices are ranked.
| Provider | 1M input | 1M output | 1M cache read | 1M cache write | Context | Changed |
|---|---|---|---|---|---|---|
| Ofox | Cheapest$1 | Cheapest$8 | $0.104 | — | 256k | 16d agoout −20% |
| Poe | $1.1 | $9 | $0.11 | — | 400k | — |
| Jiekou.AI | $1.125 | $9 | — | — | 400k | — |
| Abacus | $1.25 | $10 | — | — | 400k | — |
| Azure | $1.25 | $10 | $0.125 | — | 400k | — |
| Azure Cognitive Services | $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 | — |
| 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 | — |
GPT-5.1 Codex Max pricing FAQ
What is the cheapest GPT-5.1 Codex Max API?
As of Oct 4, 2026, Ofox has the lowest GPT-5.1 Codex Max output price at $8 per 1M tokens, and Ofox has the lowest input price at $1 per 1M tokens. Prices are metered per-token rates in USD; free tiers and subscription plans are excluded.
How many providers offer GPT-5.1 Codex Max?
14 providers list GPT-5.1 Codex Max on Sovyron; 14 of them sell it at a metered per-token price.
Is GPT-5.1 Codex Max free?
No provider in the Sovyron catalog lists a free tier for GPT-5.1 Codex Max.
What is the context window of GPT-5.1 Codex Max?
GPT-5.1 Codex Max supports a 400k-token context window and up to 128k output tokens.