Grok Voice 3.0 Online: Sub-Second Real-Time AI Voice

Grok Voice 3.0 is xAI’s native speech-to-speech model, released on October 14, 2026 and available through the Voice Agent API as grok-voice-latest. Unlike a text-layer pipeline, it processes audio in and generates audio out without transcribing to text in between, which is what makes sub-second responses and natural interruption handling possible. On the Artificial Analysis Speech-to-Speech Index it scores 86.9 — the highest overall score in the October 2026 ranking.

Grok Voice 3.0 raises the AA Speech-to-Speech Index from 81.3 to 86.9, improves noisy and accented call handling (τ-Voice) from 56.5% to 71.6%, and lifts Big Bench Audio speech reasoning from 97.2% to 98.5%. The API price is unchanged at $0.08 per minute. One trade-off: time to first audio is 0.81s on 3.0 versus 0.70s on 2.0, so 3.0 spends about 110ms more to deliver noticeably stronger reasoning.

Yes. The instant showcase and the 30-second browser mic test on this page are free and require no account. They run through your browser’s speech engine, so no Grok Voice API credits are consumed. GrokImage.ai also gives new accounts 30 free credits — enough for one Grok Imagine image — for visual generation. The production Voice Agent API is a paid service at $0.08 per minute ($4.80 per hour).

Grok Voice 3.0 reaches its first audio in 0.81 seconds, according to Artificial Analysis. That is about 40% faster than GPT-Live-1 at 1.34 seconds, and it sits inside the sub-second window where a reply still feels like a reaction rather than a response. Grok Voice 2.0 is slightly faster at 0.70 seconds, but scores lower on reasoning and turn-taking.

On the overall AA Speech-to-Speech Index, yes: 86.9 for Grok Voice 3.0 versus 83.2 for GPT-Live-1 (Astra) and 82.6 for Gemini 3.8 Live. It also leads on speech reasoning (98.5%), full-duplex dynamics (97.0%), task completion (94.8%) and Speech Agent Arena Elo (1070). It does not lead everywhere: GPT-Live-1 still wins τ-Voice noisy-support handling at 74.5% versus 71.6%.

Full duplex means the model can listen and speak at the same time, so you can interrupt it mid-sentence instead of waiting for your turn. The Full Duplex Bench measures how naturally a model handles barge-in, pauses, backchannels and overlapping speech. Grok Voice 3.0 scores 97.0%, compared with 95.1% for 2.0, 94.9% for GPT-Live-1 and 91.9% for Gemini 3.8 Live. Higher scores mean fewer robotic “please wait” moments.

Yes. Open the Voice → Image tab, speak a scene, and GrokImage turns the transcript into a visual prompt. You can refine it by voice or edit it by hand, then render it with Grok Imagine using your free credits. Once the still looks right, you can animate it with the Grok video generator. The voice preview itself runs in your browser; the image generation goes through GrokImage’s normal credit system.

The xAI list price is $0.08 per minute of audio, or $4.80 per hour. On Artificial Analysis’ Big Bench Audio run, the measured average cost per task is $0.025, compared with $0.030 for GPT-Live-1 (Astra) and $0.055 for GPT-Realtime-2.1. Pricing can vary by contract and volume, so treat the per-task figures as a benchmark rather than a quote.

Grok Voice 3.0 supports 25+ languages and dialects, including English, Spanish, Japanese, Chinese, French, German, Hindi, Arabic, Korean, Portuguese, Italian and Turkish. Dialect adaptation lets the same voice shift its accent when the conversation changes language, instead of switching to a different-sounding speaker.

No. The mic test and Voice → Image preview on this page use the Web Speech API built into your browser. GrokImage.ai does not upload or store that audio. Depending on your browser, the speech engine itself may process audio remotely under that vendor’s policy — Chrome, for example, uses Google’s speech service. The production Grok Voice API is a separate, paid stream.