A/B Test AI Prompt Variations for Better Outputs
Stop guessing which prompt works best. Systematically test variations against real inputs, measure quality with statistical significance, and ship the prompts that actually perform.
Run Tests in Seconds
Fire prompt variants against your sample inputs using OpenAI or Anthropic APIs instantly.
Statistical Significance
Know when a winner is real. Built-in significance scoring so you never ship on noise.
Track & Compare
Store every test run. Compare across time, models, and use cases in one dashboard.
Simple Pricing
Pro
- ✓ Unlimited prompt templates
- ✓ Up to 500 test runs/month
- ✓ OpenAI & Anthropic support
- ✓ Statistical significance scoring
- ✓ Full test history & comparison
- ✓ CSV export
- ✓ Email support
Cancel anytime. No contracts.
FAQ
Which AI models are supported?
PromptSplit works with OpenAI (GPT-4o, GPT-4, GPT-3.5) and Anthropic (Claude 3.5, Claude 3) out of the box. You bring your own API keys.
How does statistical significance work?
We use a scoring model based on output quality ratings across multiple runs. Once enough samples are collected, we calculate confidence intervals so you know when a variant is a genuine winner.
Can I cancel anytime?
Yes. Cancel from your account dashboard at any time. You keep access until the end of your billing period with no questions asked.