New Fable5/Opus4.8 harness called "Schema" claims 99% on ARC-3 [R]
Schema, the harness we introduce today, reaches 99% on the ARC‑AGI‑3 Public set using Claude Opus 4.8 and Fable 5, and 95.35% using GPT‑5.6 Sol. It does not change the underlying model weights. Instead, it changes the pr
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