Schema Harness Claims High Score on ARC-3
we_are_mammals · reddit · 2026-07-17
The post introduces a new harness named Schema, which claims to achieve exceptionally high scores on the ARC-AGI-3 Public set without modifying model weights. It does so by altering observation modeling, history verification, and plan execution/revision processes.
Reported results include hitting 99% with Claude Opus 4.8 and Fable 5, and 95.35% with GPT-5.6 Sol. The author details a fixed fallback rule: run the stronger configuration first, and if a level falls below a threshold, rerun it with an even stronger config, keeping the highest score per level.
Related event: Schema Harness Sparks ARC-AGI-3 Debate(14 posts)→
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