# Hiding Tool Latency in On-Device Cascaded Voice Agent through Speculative Execution > Source: > Published: 2026-10-07 02:30:46+00:00 Tool-augmented speech assistants typically serialize automatic speech recognition, large language model inference, and external tool execution. As a result, tool latency is incurred only after the user has finished speaking and the LLM has identified the required tool calls. We present speculative t