Across three speech-to-speech APIs, tool-based guardrails add 0.6-1.4s and fail a 0.4s conversational-delay target; only Amazon Nova Sonic's transcript-based guardrails stayed under it for both input types.
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Safeguards for Speech2Speech LLM-Assistants: A Case Study in Automotive Applications
Across three speech-to-speech APIs, tool-based guardrails add 0.6-1.4s and fail a 0.4s conversational-delay target; only Amazon Nova Sonic's transcript-based guardrails stayed under it for both input types.