ARC-AGI-3 new approach: LLM-guided symbolic world model synthesis, Opus writes 269 programs in one pass
fchollet · x · 2026-08-14
François Chollet highlights Jeremy Berman's work demonstrating a powerful approach: LLM-guided on-the-fly synthesis of symbolic world models, encoding causal understanding as executable code. All top-performing harnesses on ARC-AGI-3 use this style. Jeremy's harness had Opus write 269 programs (12,700 lines) in one pass, building parsers for 25 games, search functions for 23, and simulators for 9. Chollet notes ARC 3 has incentivized progress in this area.
Related event: Opus 5 Tops ARC-AGI-3 via Claude Code(7 posts)→
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