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OpenAI logoGPT-5.4 NanoOpenAI
Best input$0.10 /MTok
Best output$0.625 /MTok
Cache read$0.01
Context400K
Max output128K
Modalities infile, image, text
Tool calling
Structured output
Reasoning
Vision
Audio input
Prompt caching
Providers4
Cheapest providerOpenAI
LicenseProprietary
ReleasedMar 17, 2026