Context Compaction Unlocks ARC-AGI-3 SOTA: The Untapped Potential of Harness Engineering
eldonredwards · x · 2026-07-30
Ethan Mollick points out that we have barely begun to understand harness engineering, which holds huge untapped potential even without model improvements. The quoted tweet demonstrates a specific case: by allowing the model to reason across multiple context windows with a canonical compaction implementation, GPT-5.6 Sol achieves SOTA on the ARC-AGI-3 benchmark.
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