AppleAnalysisAI AgentsOctober 15, 2026

Apple study compares Plan-then-Retrieve vs Retrieve-then-Plan tool discovery

Read original source →machinelearning.apple.com

On ToolBench's 46,984 API endpoints, Retrieve-then-Plan wins on single-tool queries while Plan-then-Retrieve wins on multi-tool queries, holding at every retrieval budget k=1 to 20. PtR's extra discovery call roughly doubles inference cost, and a stub-hallucination failure mode invents non-existent API names.

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