# SpaceXSI launches Grok Voice 3.0 with top speech-to-speech scores

> The new model scores 86.9 on Artificial Analysis' Speech-to-Speech Index, beating OpenAI and Google, and is now live in the Voice Agent API.

Oossa · 2026-10-14 · https://oossa.com/en/spacexsi-launches-grok-voice-3-0-with-top-speech-to-speech-scores

SpaceXSI, Elon Musk’s AI unit, announced Grok Voice 3.0 on Oct 15, 2026. The model powers its Voice Agent API for customer‑support and sales calls. Independent tester Artificial Analysis gave it an 86.9 score on its Speech‑to‑Speech Index, the highest among comparable systems.

## How Grok Voice 3.0 compares

Artificial Analysis measures reasoning, task success and listener votes in blind head‑to‑head calls. OpenAI’s GPT‑Live‑1 (using the GPT‑6 Astra model) scored 83.2, and Google’s Gemini 3.8 Live scored 82.6. In the Full Duplex Bench test for natural pauses, Grok Voice 3.0 received a 97% rating. On a support‑call test with heavy accents (Tau‑Voice), the model reached the first audio 40% faster than the OpenAI runner.

## Pricing and availability

Grok Voice 3.0 is already available through the Voice Agent API at 8 cents per minute ($4.80 per hour), the same price as the prior version. Developers using the grok‑voice‑latest alias are automatically switched to the new model without any code changes.

## The facts

- SpaceXSI released Grok Voice 3.0 on Oct 15, 2026.
- Artificial Analysis ranked Grok Voice 3.0 at 86.9 on its Speech‑to‑Speech Index.
- OpenAI’s GPT‑Live‑1 scored 83.2 and Google’s Gemini 3.8 Live scored 82.6 on the same index.
- Full Duplex Bench gave Grok Voice 3.0 a 97% natural‑conversation rating.
- The model costs 8 cents per minute ($4.80 per hour) in the Voice Agent API.

## Why it matters

Businesses that run voice‑based support or sales bots can get more accurate, faster‑responding conversations without raising costs. The pricing stays unchanged, so existing users can upgrade immediately. For everyday drivers, the improved model means smoother interactions when they ask their Tesla or Starlink service for help.

## Sources & references

1. [Grok Voice 3.0 from SpaceXSI outscores OpenAI and Google on speech-to-speech index](https://siliconangle.com/2026/10/14/grok-voice-3-0-from-spacexsi-outscores-openai-and-google-on-speech-to-speech-index/) – SiliconANGLE, 2026-10-14

Last updated: 2026-10-14