OpenAI › GPT-5.1 Codex Max › Pricing
$1.25 / $10per 1M tokens in / out
$0.13cache read · −90%
#413on OpenRouter by tokens · 211M / week
Price sheetper 1M tokens
| Input | $1.25 | Azure |
| Output | $10 | |
| Cache read | $0.13 | −90% vs input |
| Context · max output | 400K · 128K | tokens |
Where to buy1 provider · per 1M tokens
| Provider | Input | Output | Context |
|---|---|---|---|
| Azure | $1.25 | $10 | 400K |
In OpenAI's line-upper 1M in / out
| GPT-6 Luna Decisions | $0.10 / — | −100% |
| GPT OSS 20B | $0.018 / $0.09 | −99% |
| GPT OSS 120B | $0.03 / $0.15 | −98% |
| GPT OSS Safeguard 20B | $0.07 / $0.20 | −97% |
| GPT-6 Luna | $0.10 / $0.50 | −94% |
| GPT OSS Safeguard 120B | $0.15 / $0.60 | −92% |
| GPT-5.4 Mini (2026-03-17) | $0.75 / $4.50 | −51% |
Pricing questions
How much does GPT-5.1 Codex Max cost?›
$1.25 per 1M input tokens and $10 per 1M output tokens. Cached input is $0.13.
Is GPT-5.1 Codex Max free to use?›
There is no free API tier.
How much does prompt caching save?›
Cache reads cost $0.13 per 1M, 90% below the input price.