SpaceXAI has released Grok Voice Transcribe 2.0, taking the #1 spot for Final Transcript accuracy and First Partial Transcript accuracy on AA-WER Streaming with 2.7% WER at 0.49s after end of speech
Grok Voice Transcribe 2.0 is @SpaceXAI's new Speech to Text model, succeeding Grok Voice Transcribe 1.0 (previously Grok Speech to Text). It improves streaming Final Transcript WER from 3.9% to 2.7% and non-streaming AA-WER from 4.0% to 2.3%. It is available through the SpaceXAI API for both streaming and non-streaming transcription, at the same price as its predecessor.
Key takeaways
➤ Final Transcript: Grok Voice Transcribe 2.0 achieves 2.7% WER at 0.49s after end of speech. It is more accurate but slower than Muse Voice Transcribe at 3.1% and 0.16s, and ElevenLabs Scribe v2 Realtime at 3.6% and 0.14s. It is also more accurate, though slightly slower, than Cartesia Ink-2 (semantic endpoints) at 3.4% and 0.43s
➤ First Partial Transcript: The model achieves 3.4% WER at 0.49s, just ahead of Muse Voice Transcribe and ElevenLabs Scribe v2 Realtime on accuracy, both at 3.6%, though slower than both at 0.13s. It is more accurate but slower than Cartesia Ink-2 (semantic endpoints) at 4.9%…
streaming — Sending a model's response token by token as it is generated, so the reader sees text immediately instead of waiting for the whole answer.
AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
Why it matters
Gives voice-AI agentAn AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.Full definition → builders a concrete drop-in ASR upgrade: better streamingSending a model's response token by token as it is generated, so the reader sees text immediately instead of waiting for the whole answer.Full definition → accuracy at comparable latency and unchanged pricing versus the prior model.
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