LLM-BabyBench: Can Language Models Plan in Worlds They Can Simulate?
Across seven frontier and open models, simulation is far ahead of planning for every model, near saturation for the strongest and well short of it for the weakest, and the length of the required solution, not grid size or obstacle count, governs planning failure.
Idriss Malek, Omar Choukrani, D. Orel et al.
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