Grok Speech (STT + TTS APIs) vs Agentforce Vibes 2.0
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
Agentforce Vibes 2.0
Salesforce's multi-model agent platform (Claude Sonnet + GPT-5 + open harness), paired with Headless 360 that turns every Salesforce capability into an API/MCP/CLI for external agents. Launched at TDX 2026 on 2026-04-15
| Category | Grok Speech (STT + TTS APIs) | Agentforce Vibes 2.0 |
|---|---|---|
| Ease of Use | 7.0 | 6.0 |
| Output Quality | 8.5 | 8.0 |
| Value | 9.0 | 6.0 |
| Features | 8.0 | 9.0 |
| Overall | 8.1 | 7.3 |
Pricing Comparison
| Feature | Grok Speech (STT + TTS APIs) | Agentforce Vibes 2.0 |
|---|---|---|
| Free Tier | No | No |
| Starting Price | $0.10 | Contact sales |
Which Should You Pick?
Pick Grok Speech (STT + TTS APIs) if...
- ✓Easier to use (7 vs 6)
- ✓Better value for money (9/10)
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 Agentforce Vibes 2.0 if...
- ✓More features (9 vs 8)
Enterprise Salesforce shops with existing Agentforce deployments and mature agent platform teams. Also firms where Claude or GPT-5 are already approved for enterprise use -- Vibes 2.0 inherits model selection flexibility.
Visit Agentforce Vibes 2.0Our Verdict
Grok Speech (STT + TTS APIs) edges out Agentforce Vibes 2.0 with a 8.1 vs 7.3 overall score. Both are solid picks, but Grok Speech (STT + TTS APIs) has the advantage in output quality.