SpaceXAImodelGrok Voice Think Fast 2.0
A speech-to-speech model for building phone and voice agents, priced per minute of audio.
Details
- Priced at $0.08 per minute of audio
- grok-voice-latest moved to this model on August 5, 2026, and staying on the older version meant pinning grok-voice-think-fast-1.0 before that date
- SpaceXAI says existing prompts need no edits to move over
- The model speaks in shorter sentences and asks one question at a time
- SpaceXAI reports higher sales conversion and support containment in A/B tests on the Starlink support line
Best for
Voice agents that hold a real conversation and call tools mid-call
When to use it
You are building a support or sales line rather than a text chatbot
Who benefits
Teams running phone support or outbound calling who want to test an AI voice
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