Grok Voice API vs Mistral Voxtral
How the two platforms compare on pricing, live demos, calls, integrations, and setup — highlighted where they differ.
Developer API
Grok Voice API
Realtime speech-to-speech API on Grok Voice 3.0 for building voice agents, at $0.08 per minute, with SIP calls, tool use and OpenAI Realtime compatibility.
Developer API
Mistral Voxtral
Mistral AI's Voxtral 3 speech-to-text and text-to-speech models plus a Voice Agents SDK built on LiveKit, from $0.04 per minute for a complete voice agent.
Highlighted rows differ between these picks
| Attribute | Grok Voice API | Mistral Voxtral |
|---|---|---|
| Platform type | Developer API | Developer API |
| Pricing | $0.08/min $0.08/min speech-to-speech; TTS $15/M characters; STT from $0.10/hour | $0.04-$0.08/min $0.04-$0.08/min voice agents; transcription from $0.0035/min; TTS $13/M characters |
| Test it | Open live demo | Free trial |
| Calls | Inbound | Inbound |
| Human handoff | Yes | No |
| Setup difficulty | Technical | Technical |
| Use cases | Customer Support Lead Qualification Custom Voice Apps Telephony Agents | Customer Support Custom Voice Apps Real Time Assistants Telephony Agents |
| Useful for |
|
|
| Integrations | ||
| LiveKit | ||
| WebSocket | — | |
| SIP | — | |
| Twilio | — | |
| MCP | — | |
| Web and X search | — | |
| OpenAI Realtime clients | — | |
| SIP (enterprise) | — | |
| Python SDK | — | |
| Node.js SDK | — | |
| +4 more across these tools — see each profile for the full list. | ||
Platform type
- Grok Voice API
- Developer API
- Mistral Voxtral
- Developer API
Pricing
- Grok Voice API
$0.08/min
$0.08/min speech-to-speech; TTS $15/M characters; STT from $0.10/hour
- Mistral Voxtral
$0.04-$0.08/min
$0.04-$0.08/min voice agents; transcription from $0.0035/min; TTS $13/M characters
Test it
- Grok Voice API
- Open live demo
- Mistral Voxtral
- Free trial
Calls
- Grok Voice API
- Inbound
- Mistral Voxtral
- Inbound
Human handoff
- Grok Voice API
- Yes
- Mistral Voxtral
- No
Setup difficulty
- Grok Voice API
- Technical
- Mistral Voxtral
- Technical
Use cases
- Grok Voice API
- Customer SupportLead QualificationCustom Voice AppsTelephony Agents
- Mistral Voxtral
- Customer SupportCustom Voice AppsReal Time AssistantsTelephony Agents
Useful for
- Grok Voice API
- • Developer teams building realtime voice agents
- • Teams moving off the OpenAI Realtime API
- • Agents that need live web or X search
- • One flat per-minute speech-to-speech price
- Mistral Voxtral
- • Teams wanting a European voice AI vendor
- • Multilingual transcription and voice agents
- • Low per-minute voice agent cost
- • Swapping the model, voice or language per agent
Integrations
| Grok Voice API | Mistral Voxtral | |
|---|---|---|
| LiveKit | ||
| WebSocket | — | |
| SIP | — | |
| Twilio | — | |
| MCP | — | |
| Web and X search | — | |
| OpenAI Realtime clients | — | |
| SIP (enterprise) | — | |
| Python SDK | — | |
| Node.js SDK | — |
+4 more across these tools — see each profile for the full list.
What would these cost to run?
Enter your call volume once and see Grok Voice API and Mistral Voxtral priced at the same usage, ranked alongside every other platform.