Playground
Prompt Regression Tester
Run the same prompt across Claude 4.5/4.6/4.7, GPT-5, Gemini 2.5 with your own keys. Diff outputs; catch drift before production. Browser-only. Free.
- Inputs
- Prompt / input + API key
- Runtime
- 2–15 s per model call
- Privacy
- Client-side · no upload
- API key
- BYO key (Anthropic · OpenAI · Google)
- Methodology
- Open →
BYO keys · client-side only
You provide your own API keys for each target. Keys stay in your browser's React state for the session; nothing is persisted or sent anywhere except the respective provider's API.
1 · Prompt
2 · Targets
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