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OpenAI logoGPT-5.1-Codex-MaxOpenAI
Best input$1.25 /MTok
Best output$10.00 /MTok
Cache read$0.125
Context400K
Max output128K
Modalities intext, image
Tool calling
Structured output
Reasoning
Vision
Audio input
Prompt caching
Providers1
Cheapest providerAzure
LicenseProprietary
ReleasedDec 4, 2025