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OpenAI logoGPT-5 NanoOpenAI
Best input$0.025 /MTok
Best output$0.20 /MTok
Cache read$0.003
Context400K
Max output128K
Modalities intext, image, file
Tool calling
Structured output
Reasoning
Vision
Audio input
Prompt caching
Providers4
Cheapest providerOpenAI
LicenseProprietary
ReleasedAug 7, 2025