Find the best AI for your actual prompts.

Here's What "Testing" Actually Means

You give us an example prompt + what a good answer looks like. We test it on multiple AIs and show you which one performs best.

  1. Your Example
    INPUT:
    "Summarize this support ticket in 2 sentences"
    EXPECTED ANSWER:
    "Customer was overcharged $50, requests refund."

  2. Each AI Responds
    Claude 3.594% match
    GPT-4 78% match
    Gemini Pro 61% match

  3. You See the Winner
    🏆
    Claude 3.5 Wins
    Best match for YOUR task
    + 40% cheaper than GPT-4o

That's it. No coding. No API setup. Just paste your prompt and see which AI works best.

The 4 Problems Every AI Builder Faces

If you're using AI for work, you've hit at least one of these walls

"Which AI should I even use?"

Everyone says ChatGPT is the best. But Claude might be better for YOUR task. Gemini is free—could it work just as well? You're stuck guessing.

✓ PromptPerf tests YOUR prompts across all major AIs so you know which one actually performs best for your specific use case.

"I'm paying for the wrong AI model"

ChatGPT-4 costs 30x more than GPT-3.5. What if a cheaper model works just as well for YOUR prompts? Most teams never find out—they just pick the "best" model by reputation, not by testing.

✓ PromptPerf tests YOUR prompts across all major AIs to find the most cost-effective option for your specific use case.

"I don't know if my prompts actually work"

You write a prompt that seems to work. But does it work reliably across different inputs? You have no way to systematically test it before putting it in production.

✓ PromptPerf lets you create tests with multiple examples, so you can verify your prompts work across different scenarios.

"My prompts suddenly got worse"

OpenAI, Anthropic, and Google update their AIs constantly. A prompt that worked great last month might suck today—and you'd never know.

✓ PromptPerf lets you save tests and re-run them anytime to catch when AI updates break your prompts.

PromptPerf solves all of this—without writing code

Test your prompts across 100+ AI models including GPT-5.1, Claude 4.5, and Gemini 3

See which AI performs best for YOUR specific task (not generic benchmarks)

Access free models from DeepSeek, Meta Llama 4, and others

Save tests and re-run anytime to monitor when models update

See It In Action

walkthrough of how PromptPerf works

PrompPerf 2 0 - YouTube

Stop Guessing. Start Testing.

Join 117+ AI builders who've found their best AI model with PromptPerf

Plans starting at $9/month • Lifetime access available for $199