GPT-5 Pro

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openai llm
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A dated snapshot of GPT-5 Pro, providing a stable inference point for reproducibility.

context window 128K tokens
max output 272K tokens
input price $15 / 1M tokens
output price $120 / 1M tokens
reasoningtool-usejson-modestreamingcode-generationfunction-callingprompt-cachingvision
releasedOct 2025
knowledge cutoffApr 2025