Split Test AI Prompts with Automatic Winner Detection
Run A/B tests on prompt variations, measure response quality with LLM judges, and auto-promote winning versions — all in one dashboard.
Start for $29/moNo credit card required to explore. Cancel anytime.
OpenAI & Anthropic
Works with any LLM API
LLM Judge Scoring
Automated quality metrics
Auto-Promotion
Winners go live instantly
Simple Pricing
Pro
$29
/month
- ✓ Unlimited prompt A/B tests
- ✓ OpenAI & Anthropic integrations
- ✓ LLM judge quality scoring
- ✓ Statistical significance detection
- ✓ Auto-promote winning prompts
- ✓ Real-time test dashboard
FAQ
How does automatic winner detection work?
We run both prompt variants simultaneously, score each response using an LLM judge, and apply statistical significance testing. Once a variant reaches confidence threshold, it is automatically promoted as the active prompt.
Which AI providers are supported?
Prompt A/B Splitter works with OpenAI (GPT-4, GPT-3.5) and Anthropic (Claude) out of the box. You bring your own API keys — we never store your credentials.
Can I cancel my subscription anytime?
Yes. Cancel from your account dashboard at any time. You keep access until the end of your billing period with no hidden fees.