Run the same fixed set of coding and reasoning tasks on every new model, score it, and see how it stacks up against the last one.
A custom endpoint only works if that provider allows direct browser requests and this sandbox can reach that domain — use "Test connection" before relying on it. Your key is saved in this app's private storage so you don't have to retype it each time; treat it like anywhere else you'd paste a key.
Paste each response under its task, then tap Judge — it's graded automatically against that task's rubric. You can always override the score by tapping Fail / Partial / Pass yourself.
Unsure between Partial and Pass? Default to Partial — it keeps the leaderboard meaningful instead of everything clustering near 100%. Each task below names the correct answer or the specific thing to check for, so you don't have to work it out yourself.