# xAI Moved Every grok-voice-latest Agent to Grok Voice 3.0 on 14 October, at the Same $0.08 a Minute

xAI released Grok Voice 3.0 in its Speech to Speech API on 14 October at $0.08 per minute, the price of Grok Voice 2.0, and says agents on grok-voice-latest "have already been switched over automatically". Its quality figures come from Artificial Analysis as quoted by xAI, and we have not tested it.

By Neomanex. Updated 2026-10-30.

**Our take: Grok Voice 3.0 arrived through an alias that moves on its own, which is fine for a demo and risky in production. If a live voice agent runs on `grok-voice-latest`, it changed models on 14 October whether you were ready or not. Re-test it this week. The price did not move, so the only cost is the testing.**

Affected model: [Grok Voice 3.0](/models/grok-voice-3-0), which our directory rates **Conditional**: we have not tested it, and the alias moved to it without asking anyone.

## What happened

xAI's post, dated 14 October 2026, says: "Grok Voice 3.0 is available today in the Speech to Speech API at $0.08 / min ($4.80 / hr), the same price as Grok Voice 2.0." It adds: "Agents using grok-voice-latest have already been switched over automatically, with no changes needed."

xAI quotes these Artificial Analysis figures:

| Metric | Grok Voice 3.0 | Grok Voice 2.0 |
|---|---|---|
| Speech-to-Speech Index | 86.9 | 81.3 |
| τ-Voice success rate | 71.6% | 56.5% |
| Cost per task (Big Bench Audio) | $0.025 | not given |

These are Artificial Analysis numbers as relayed by xAI. We did not read them on Artificial Analysis, and we have not run the model ourselves.

## Why it matters

The upgrade was not opt-in. Any agent pointed at `grok-voice-latest` is now on a different model, and a 15-point jump on τ-Voice means behaviour changed, not just scores. Prompts tuned for 2.0, tool-call patterns, latency budgets and voice tone can all shift under a new model even when the headline numbers go up.

The launch post also names no model id for Grok Voice 3.0 beyond the `grok-voice-latest` alias, and none for 2.0. From the post alone, we cannot tell you how to pin the old version or lock to 3.0 so the next release does not move you again.

## What changes for you

- **Running a production voice agent on `grok-voice-latest`:** re-run your test calls now. Check prompts, tool calls, latency and tone against what you shipped.
- **Need stability:** check xAI's API docs for a pinned model id before assuming you can stay on one version. The launch post gives none.
- **Budget:** unchanged at $0.08 per minute ($4.80 per hour).
- **Choosing a voice model:** the benchmark gap over 2.0 is large on paper, but it is one evaluator's numbers relayed by the vendor. Test on your own calls before you commit.

Canonical: https://neomanex.com/news/grok-voice-3-grok-voice-latest-switched-same-0-08-per-minute