A/B Test AI Prompts
with Real Metrics
Run parallel prompt versions against real inputs and instantly measure quality, cost, and speed differences — across OpenAI and Anthropic.
Side-by-Side Runs
Execute Prompt A and Prompt B simultaneously against the same inputs.
Real Metrics
Compare latency, token cost, and output quality scores in one dashboard.
Multi-Provider
Works with OpenAI GPT-4o and Anthropic Claude out of the box.
Simple Pricing
Everything you need to ship better prompts faster.
- ✓Unlimited A/B prompt experiments
- ✓OpenAI & Anthropic integrations
- ✓Cost, latency & quality metrics
- ✓Experiment history & versioning
- ✓CSV export of results
- ✓Priority email support
Cancel anytime. No contracts.
FAQ
How does the A/B testing work?
You define two prompt versions (A and B), provide a set of test inputs, and Prompt A/B Runner executes both against each input in parallel. Results — including latency, token usage, and cost — are displayed side by side so you can make data-driven decisions.
Which AI providers are supported?
Currently OpenAI (GPT-4o, GPT-3.5-turbo) and Anthropic (Claude 3 family) are supported. You bring your own API keys — we never store them permanently.
Can I cancel my subscription at any time?
Yes. You can cancel anytime from your billing portal. You keep access until the end of your billing period with no hidden fees or penalties.