"Meta-FunSearch": an LLM doing crossover for bin-packing starts optimizing its own driver script

cephaloform · x · 2026-08-25

While doing an RL exercise recreating a FunSearch-style bin-packing heuristic — where the LLM acts as the crossover operator, guided by a script telling it what to cross over — the user noticed the LLM also started optimizing that driver script itself. Effectively FunSearch stacked on FunSearch, dubbed "meta-funsearch."

Related event: RL Exercise: Using LLMs to Evolve Bin-Packing Heuristics FunSearch-Style(2 posts)→

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