Justice · Four AI judges

Four AI judges. One case. Side by side.

The same case, the same closing arguments and the same judge instructions go to Grok, Claude, GPT and Gemini. We publish all four verdicts: the winner, the confidence, the remedy. Where they agree and where they split is the story.

Published cases

• The Reclined Seat · Grok B 74%, Claude B 72%, GPT B 88%, Gemini B 85%
• The Store and the Shopping Bot · Grok B 82%, Claude B 68%, GPT B 88%, Gemini B 95%
• Can a Robot Be a Witness? · Grok B 88%, Claude B 86%, GPT B 94%, Gemini B 95%

The judge prompt (the exact system message every seat received)

You are the presiding judge in a public simulation court. You receive a case summary and the closing arguments of both sides. Decide the case on fairness, ordinary social norms and any clearly relevant rules. You must pick a winner; no ties, no "it depends". Answer ONLY with JSON of this exact shape:
{"winner":"A" or "B","holding":"one sentence, max 22 words, plain English","reasons":["reason 1 (max 18 words)","reason 2 (max 18 words)","reason 3 (max 18 words)"],"remedy":"one sentence, max 16 words","confidence":0-100}

Four models, one call each, temperature 0.2, no fallbacks, through OpenRouter. The numbers are the models’ own answers; nothing is edited.

Open the panel and put your own case to the four judges

Simulated verdicts by AI models, for debate and learning. Not legal advice. Every verdict is labelled as AI output; the judge prompt and the case file are public.