GPT-5.1 Codex
Updated Sep 11, 2026
gpt-codex400k context272k max outputreleased Nov 13, 2025ReasoningTool calling
Official
—
output per 1M tokens
Providers
19
offering this model
Spread
1.2×
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 |
|---|---|---|---|---|---|
| OpenCode Zen | Cheapest$1.07 | Cheapest$8.5 | $0.107 | — | 400k |
| Poe | $1.1 | $9 | $0.11 | — | 400k |
| Jiekou.AI | $1.125 | $9 | — | — | 400k |
| Abacus | $1.25 | $10 | $0.125 | — | 400k |
| AIHubMix | $1.25 | $10 | $0.125 | — | 400k |
| Azure | $1.25 | $10 | $0.125 | — | 400k |
| Azure Cognitive Services | $1.25 | $10 | $0.125 | — | 400k |
| Eden AI | $1.25 | $10 | $0.125 | — | 272k |
| Helicone | $1.25 | $10 | $0.125 | — | 400k |
| Impossibl | $1.25 | $10 | $0.125 | — | 400k |
| Kilo Gateway | $1.25 | $10 | $0.13 | — | 400k |
| DevPass (LLM Gateway) | $1.25 | $10 | $0.125 | — | 400k |
| LLM Gateway | $1.25 | $10 | — | — | 400k |
| NanoGPT | $1.25 | $10 | $0.125 | — | 400k |
| OpenRouter | $1.25 | $10 | $0.13 | — | 400k |
| OrcaRouter | $1.25 | $10 | $0.125 | — | 400k |
| Vercel AI Gateway | $1.25 | $10 | $0.13 | — | 400k |
| Vivgrid | $1.25 | $10 | $0.125 | — | 400k |
| ZenMux | $1.25 | $10 | $0.12 | — | 400k |