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GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
Input
$1.25
per 1M tokens
Output
$10.00
per 1M tokens
Blended
$3.44
per 1M tokens
Cheaper than 18% of models. Median price is $0.54/1M tokens.
Daily
$3.44
Monthly
$103.13
Context Window
400K
tokens
Larger than 78% of models
Max Output
128K
tokens
32% of context
Context Window Comparison
Price/1M
$3.44
529th cheapest
541% above median
Top 82%
Context Window
400K
77th largest
Top 22%