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fanout

This Lab calls a model. Point it at your own endpoint (OpenCode Go / kimi-k3 works) — the key stays in your browser.

prompting studio · pro

Prompt Batch Runner

Diff two prompts across a small suite and score structured wins/losses.

Does the new prompt beat the old one on 30 cases?

Engine 1.0.0 · studio needs model key

Checking for a configured model key…

Method

  • Runs two system prompts over the same baked case suite, one case at a time, and optionally judges each pair with a strict JSON judge.
  • Same cases, same model, only the prompt changes — which is the only honest way to A/B a prompt.

Keep going in prompting

prompting gamePrompt GauntletCan you keep the format under adversarial inputs?prompting studioPrompt LinterWhich words in this prompt are doing nothing?prompting studioStructured Output Schema StudioWhy does the model keep adding prose around your JSON?