Back to Voice & realtime
Model comparison
Grok Voice 3.0 vs Gemini 3.8 Live
Compare Grok Voice 3.0 and Gemini 3.8 Live using the same provider-sourced voice & realtime rubric. No mystery score and no invented benchmark ranking.
Quick take
Grok Voice 3.0
Grok's realtime voice model for spoken conversations, customer support and assistants that can use tools during a call.
Best for
- Customer-support calls
- Multilingual voice assistants
- Voice agents connected to business tools
Watch out for
Test interruptions, accents and tool failures with real calls. The provider's latency claim is not a guarantee for your complete application; context and knowledge-cutoff limits are not published.
Gemini 3.8 Live
Google's real-time voice model for responsive conversations with audio, text and visual context.
Best for
- Conversational customer support
- Voice assistants with camera context
- Everyday tool-using voice agents
Watch out for
Audio input and output are charged separately, not as one flat call-minute price. Text, visual context, thinking and search can add to the bill.
Compare the published facts
Grok Voice 3.0 vs Gemini 3.8 Live
Values use each provider's own published units and limits. A blank means the provider did not publish a directly comparable value in the sources reviewed.
| Voice & realtime | Grok Voice 3.0 | Gemini 3.8 Live |
|---|---|---|
| Price basisToken-, character-, or minute-based price for the listed access route. | $0.08 / audio minute | Audio $0.005/min in · $0.018/min out |
| Interaction modeSpeech-to-speech, audio-to-audio, or streamed text-to-speech behavior. | Realtime speech-to-speech with tools | Speech-to-speech with visual input and interleaved reasoning |
| Published latencyProvider-published measurement with its stated exclusions; not a Cody test. | Sub-second provider claim | Not published |
| LanguagesProvider-documented language coverage or a clear unpublished marker. | 20+ languages | 97 languages (Google launch claim) |
| Tools & controlNative function calling, reasoning, or speech-control features. | Functions, web/X/file search and remote MCP | Functions (async by default), search grounding |
| Context or input limitDocumented token or character limit where it is meaningful. | Not published | 131,072 input · 65,536 output |
How to choose
Compare the job, not the hype.
Start with the job you need to complete, then validate cost, access, and policy details on your exact provider route.
Grok Voice 3.0
SpaceXAI says it does not train on API inputs or outputs without explicit permission. Default encrypted retention is 30 days; team-level zero data retention is available with feature tradeoffs.
Provider and API links
Gemini 3.8 Live
Google says paid Gemini API prompts and responses are not used to improve its products. Unpaid-service content generally may be used, with different treatment for EEA, UK, and Swiss users; check the current terms for your account and region.
Provider and API links
Frequently asked questions
Grok Voice 3.0 vs Gemini 3.8 Live FAQ
What is the main difference between Grok Voice 3.0 and Gemini 3.8 Live?
Grok Voice 3.0: Grok's realtime voice model for spoken conversations, customer support and assistants that can use tools during a call. Gemini 3.8 Live: Google's real-time voice model for responsive conversations with audio, text and visual context.
Should I choose Grok Voice 3.0 or Gemini 3.8 Live?
Consider Grok Voice 3.0 when your priority is Customer-support calls. Consider Gemini 3.8 Live when your priority is Conversational customer support. Test both with your own data and provider route before committing.
Is this Grok Voice 3.0 vs Gemini 3.8 Live comparison based on Cody benchmarks?
No. This comparison aligns provider-published facts for the Voice & realtime category. It does not claim a universal winner or combine incompatible third-party benchmark scores.