MiMo (Xiaomi) vs Grok Speech (STT + TTS APIs)
Which one should you pick? Here's the full breakdown.
MiMo (Xiaomi)
Xiaomi's MiMo-V2.5 family launched 2026-04-22 -- Pro (1T total / 42B active MoE, 1M context, native vision+audio reasoning), Multimodal base, TTS (3 sub-models: base, VoiceDesign, VoiceClone), and ASR (open-source, English + Chinese + major dialects). Full voice pipeline for the agent era. Extra-charge 1M-context tier removed at launch
Grok Speech (STT + TTS APIs)
xAI's standalone voice APIs -- launched 2026-04-17. Built on the stack that powers Grok Voice, Tesla vehicles, and Starlink customer support. $0.10/hr STT batch, $4.20 per 1M characters TTS, 25+ languages, word-level timestamps + speaker diarization
| Category | MiMo (Xiaomi) | Grok Speech (STT + TTS APIs) |
|---|---|---|
| Ease of Use | 7.0 | 7.0 |
| Output Quality | 8.0 | 8.5 |
| Value | 9.0 | 9.0 |
| Features | 9.0 | 8.0 |
| Overall | 8.3 | 8.1 |
Pricing Comparison
| Feature | MiMo (Xiaomi) | Grok Speech (STT + TTS APIs) |
|---|---|---|
| Free Tier | Yes | No |
| Starting Price | $0 | $0.10 |
Which Should You Pick?
Pick MiMo (Xiaomi) if...
- ✓More features (9 vs 8)
- ✓Has a free tier
Teams building voice-first agentic products that need a coordinated reasoning + TTS + ASR stack from a single vendor. Also Chinese-market builders and developers who need strong multimodal (vision + audio) inputs in one API call without stitching three providers together. The no-surcharge 1M-context stance makes MiMo-V2.5-Pro especially attractive for long-document agentic workloads.
Visit MiMo (Xiaomi)Pick Grok Speech (STT + TTS APIs) if...
Developers building voice agents, real-time transcription tools, accessibility features, or high-volume TTS workloads where the cost per hour of audio actually matters at scale. Strong fit for phone-call and meeting transcription use cases where xAI's published WER advantage (5.0% on phone-call entities vs. ElevenLabs 12.0%) compounds quickly.
Visit Grok Speech (STT + TTS APIs)Our Verdict
MiMo (Xiaomi) and Grok Speech (STT + TTS APIs) are extremely close overall. Your choice comes down to specific needs -- MiMo (Xiaomi) is better for teams building voice-first agentic products that need a coordinated reasoning + tts + asr stack from a single vendor, while Grok Speech (STT + TTS APIs) works best for developers building voice agents, real-time transcription tools, accessibility features, or high-volume tts workloads where the cost per hour of audio actually matters at scale.