Compare AI Prompt Performance Across Versions
Side-by-side diffs of output quality, cost, and latency between prompt versions — with statistical significance testing built in.
Start for $29/mov1 — baseline
"Summarize this article."
Cost: $0.0042Latency: 1.8s
v2 — improved
"Summarize in 3 bullets."
Cost: $0.0021Latency: 0.9s
✓ Statistically significant improvement (p < 0.01)n=50 runs
Simple Pricing
Pro
$29
/month
- ✓Unlimited prompt versions
- ✓OpenAI & Anthropic integrations
- ✓Statistical significance testing
- ✓Cost & latency tracking
- ✓Team collaboration (up to 5)
- ✓Export reports as CSV/PDF
FAQ
Which AI providers are supported?
OpenAI (GPT-4o, GPT-4, GPT-3.5) and Anthropic (Claude 3.5, Claude 3) are fully supported. More providers coming soon.
How does statistical significance testing work?
We run each prompt version across your test suite multiple times and apply a two-sample t-test to determine if quality, cost, or latency differences are statistically significant.
Can I cancel anytime?
Yes. Cancel anytime from your billing dashboard. You keep access until the end of your billing period with no questions asked.