A/B Test AI Prompts
with Automated Metrics
Compare prompt versions side-by-side. Get automated quality scores, track token costs, and know when results are statistically significant — all in one dashboard.
Start for $29/mo⚡
Side-by-Side Runs
Execute prompt variants against the same test dataset simultaneously.
📊
Quality Scoring
Automated metrics score each response for relevance, coherence, and accuracy.
💰
Cost Tracking
See exact token usage and API costs per variant so you optimize spend.
Simple Pricing
Pro
$29
/month
- ✓Unlimited A/B tests
- ✓OpenAI & Anthropic support
- ✓Statistical significance testing
- ✓Cost & token tracking
- ✓Automated quality scoring
- ✓Export results as CSV
FAQ
Which AI providers are supported?
PromptAB works with OpenAI (GPT-4, GPT-3.5) and Anthropic (Claude 3) out of the box. You bring your own API keys.
How is statistical significance calculated?
We use a two-proportion z-test on quality scores across your test dataset runs, giving you a p-value and confidence interval for each comparison.
Can I cancel anytime?
Yes. Cancel anytime from your billing portal — no questions asked, no lock-in.