Grok Voice Think Fast 1.0

Grok Voice Think Fast 1.0 is positioned as a speech-to-speech voice model from the Grok family, designed to power real-time conversational experiences. A third-party tutorial explicitly frames the model around building real-time voice agents, suggesting its intended use is interactive, low-latency dialogue rather than offline transcription. The model's role is further clarified by its successor announcement, which describes the line as speech-to-speech and notes that later versions build on the prior generation, implying 1.0 was an earlier iteration of the same voice-first capability set.

In independent benchmark reporting carried into the successor release page, Grok Voice Think Fast 1.0 was measured on the Artificial Analysis Speech-to-Speech Quality Index at 75.7% overall, with a Speech Reasoning score of 97.1% on Big Bench Audio and a Conversational Dynamics score of 77.8% on Full Duplex Bench. Agentic performance on τ-voice Bench was recorded at 52.1%. Time to First Audio for the 1.0 model was 1.25 seconds. These figures show the model delivering strong speech reasoning but leaving room for improvement in conversational dynamics and agentic tool use, which is where the next generation reports meaningful gains, fitting the model for prototyping and production voice agents that have since been superseded.