Best-of-N

After Generating Several Candidates, Which One Do You Adopt? Designing Best-of-N That Arbitrates by Verification

With Gemini 3.5 Flash's speed, generating several implementations of the same task has become practical. The hard part is no longer generation but arbitration. Here is the design and TypeScript implementation of a Best-of-N arbiter that picks the winner using verifiable signals only — not majority vote, not self-reported confidence.