Context
400K
Max output
128K
Serving providers
1
Cheapest input
$1.25 /1M
Prices are on-demand list rates. Enterprise commitments (committed-use discounts, provisioned throughput, negotiated rates) can be materially lower.
Pricing by serving provider
standard tier · per 1M tokens · click a provider to expand| Serving provider | Input /1M | Output /1M | Endpoints | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OpenRouterCheapest | $1.25 | $10.00 | 1 | |||||||||||||||||||||
| ||||||||||||||||||||||||
Price history
input + output $/1M since we started tracking Input Output
Cost calculator
estimate your monthly spend on this model$1,050
estimated / month
Model IDs
copy the exact identifier for your platformopenrouter/openai/gpt-5.1-codex-max
Frequently asked questions
GPT-5.1-Codex-Max pricing, context and availabilityHow much does GPT-5.1-Codex-Max cost?
GPT-5.1-Codex-Max costs $1.25 per 1M input tokens and $10.00 per 1M output tokens at its cheapest provider via OpenRouter.
What is the context window of GPT-5.1-Codex-Max?
GPT-5.1-Codex-Max accepts up to 400K tokens of context and can return up to 128K output tokens.
What can GPT-5.1-Codex-Max do?
GPT-5.1-Codex-Max supports image input (vision), tool use, reasoning and prompt caching.
Other OpenAI models
compare pricing across the OpenAI lineup Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
Every weekday
AI moves fast. Here's your debrief.
News, analysis, tools, and more.
For people who build with AI