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PromptFast is a prompt playground for AI developers. Test any prompt against 13+ models across OpenAI, Anthropic, and Google — instantly, no pipeline setup required. Get real-time streaming, exact cost tracking per run, file uploads (PDF, CSV, DOCX), side-by-side model comparisons, and full experiment history. One environment. Every model. Zero wait.
Comments (2)
13 models per prompt gets expensive fast, whos footing that bill
does it show latency differences between providers side by side?
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