PromptFast

Test prompts on any model. No setup, no wait.

2 followers

Test prompts on any model. No setup, no wait.

2 followers

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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.

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PromptFast

Launch date

PromptFastTest agents on any model. No setup, no wait.

Launched on February 27th, 2026

PromptFastFast prompt testing, Skip Agent Setup, Skip Full System Runs

Launched on January 20th, 2026