Grok Speech (STT + TTS APIs) vs Cohere Transcribe
Which one should you pick? Here's the full breakdown.
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
Cohere Transcribe
Cohere's first audio model -- launched 2026-03-26 under Apache 2.0, 2B parameters, #1 on Hugging Face Open ASR Leaderboard (5.42 avg WER), 14 enterprise-critical languages. Free API with rate limits; Model Vault for production
| Category | Grok Speech (STT + TTS APIs) | Cohere Transcribe |
|---|---|---|
| Ease of Use | 7.0 | 7.0 |
| Output Quality | 8.5 | 9.0 |
| Value | 9.0 | 9.0 |
| Features | 8.0 | 7.0 |
| Overall | 8.1 | 8.0 |
Pricing Comparison
| Feature | Grok Speech (STT + TTS APIs) | Cohere Transcribe |
|---|---|---|
| Free Tier | No | Yes |
| Starting Price | $0.10 | $0 |
Which Should You Pick?
Pick Grok Speech (STT + TTS APIs) if...
- ✓More features (8 vs 7)
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)Pick Cohere Transcribe if...
- ✓Has a free tier
Enterprise teams transcribing English, European, and major APAC languages at scale who want open weights they can self-host, fine-tune, or deploy on-prem. The Apache 2.0 license removes a major procurement blocker compared to proprietary ASR, and the accuracy tier is now best-in-class for open models.
Visit Cohere TranscribeOur Verdict
Grok Speech (STT + TTS APIs) and Cohere Transcribe are extremely close overall. Your choice comes down to specific needs -- Grok Speech (STT + TTS APIs) is better 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, while Cohere Transcribe works best for enterprise teams transcribing english, european, and major apac languages at scale who want open weights they can self-host, fine-tune, or deploy on-prem.