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Evaluation and testing

Prompt A/B Testing

Run statistically rigorous A/B tests between prompt versions. Compare output quality, instruction-following rate, token efficiency, and safety compliance across variants. Identify winning prompts with confidence intervals before rolling out changes to production.

Run Prompt A/B Testing Interactively 100% client-side execution in your browser. Zero data retention.
Open Interactive Tool

What Problem Prompt A/B Testing Solves

Production AI deployments require predictable token economics, rigorous parameter verification, and deterministic schema handling. Prompt A/B Testing isolates parameters client-side before payloads hit third-party foundation model APIs.

Primary Production Use Cases

  • Test new prompt version against production baseline
  • Validate prompt improvements before deployment

Security & Data Privacy Considerations

All computations execute locally in browser memory. No prompt payloads, test inputs, or secret credentials are ever retained or stored on central servers.

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