PromptPerf
Instantly test and compare AI prompts results across models
PromptPerf launched on May 2, 2025 with 139 votes, #296 of 7,905 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
What it does
PromptPerf lets you test a prompt across GPT-4o, GPT-4, and GPT-3.5 and compares results to your expected output using similarity scoring. Models change fast. Prompts break. This helps you stay ahead. Unlimited free runs. More models coming soon.
Compare 100+ AI models including GPT-5, Claude 4.5, and Gemini 3. Test your prompts across multiple LLMs to find which AI works best for your use case. No coding required.
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