SpaceXSI releases Grok Voice 3.0, outscoring OpenAI and Google on speech benchmark

SpaceXSI released Grok Voice 3.0 on October 14, 2026, taking the top spot on Artificial Analysis' Speech-to-Speech Index with a score of 86.9, ahead of OpenAI and Google. Priced at $4.80 per hour, the model powers voice agents across Tesla vehicles and Starlink customer support, where it handles 20,000 daily calls and resolves 70% automatically. Formerly known as xAI, SpaceXSI rebranded following its acquisition by SpaceX earlier in 2026.

Grok Voice 3.0 release details

• ▪SpaceXSI released Grok Voice 3.0 on October 14, 2026, as an upgraded speech-to-speech model powering its Voice Agent API for enterprise customer support and sales operations
• ▪Developers pointing to SpaceXSI's grok-voice-latest model alias were automatically updated to Grok Voice 3.0 on October 14, 2026, without requiring operational changes

Benchmark performance and model evaluation

• ▪Grok Voice 3.0 scored 74% accuracy across more than 200 enterprise scenarios on ServiceNow Inc.'s open-source EVA-Bench benchmark
• ▪OpenAI's GPT-Live-1 maintained a lead over Grok Voice 3.0 on the Tau-Voice benchmark for heavily accented support calls, scoring 74.5% compared to Grok Voice 3.0's 71.6%
• ▪Grok Voice 3.0 ranked first on Artificial Analysis's Speech-to-Speech Index with a score of 86.9, surpassing OpenAI's GPT-Live-1 at 83.2 and Google's Gemini 3.8 Live at 82.6
• ▪Grok Voice 3.0 achieved a 97% score on the Full Duplex Bench test, which measures how naturally a speech model handles pauses and interruptions

API pricing and cost comparisons

• ▪A task on Artificial Analysis's Big Bench Audio evaluation cost approximately 2.5 cents on Grok Voice 3.0, compared to 3 cents on OpenAI's GPT-Live-1 and 5.5 cents on OpenAI's GPT-Realtime-2.1
• ▪Grok Voice 3.0 is priced at eight cents per minute, or $4.80 per hour, maintaining the same Voice Agent API pricing as Grok Voice 2.0

Starlink customer service deployment

• ▪One in four sales calls handled by Grok Voice for Starlink results in a customer purchase prior to call termination
• ▪A single customer service agent built on Grok Voice 3.0 verifies Starlink customers, troubleshoots hardware, issues account credits, and dispatches replacement equipment
• ▪Starlink customer service uses Grok Voice to answer approximately 20,000 customer calls daily across multiple languages, resolving roughly 70% without human intervention

Grok Voice usage in Tesla vehicles

• ▪Tesla Inc. vehicles handle millions of daily Grok Voice interactions, allowing drivers to check calendars and respond to email
• ▪Tesla Inc. drivers access Grok Bot for multi-step tasks like dinner bookings, utilizing the Grok Voice 3.0 model for voice interactions