Speculative Programmatic Tool Calling Overlaps Code Gen and LLM Inference

a1zhang · x · 2026-08-25

Speculative Programmatic Tool Calling (sPTC) is introduced to reduce latency by predicting and queuing tool calls during code generation, overlapping them with token streaming and REPL execution. Inspired by CPU speculative execution, it is particularly useful for systems like RLMs where code is the primary action space. Early experiments show 1-1.2x speed gains on information-dense tasks.

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