AssemblyAI launches text-to-speech API
MarkTechPost: AssemblyAI Ships AssemblyAI-TTS-1: A $15 per 1M Character Text-to-Speech API for Voice Agents
AssemblyAI has released AssemblyAI-TTS-1, its first text-to-speech model, now generally available. The AssemblyAI-TTS-1 text-to-speech API targets voice agents running on live phone calls. In that setting, latency and pronunciation decide whether a caller stays on the line. Pricing is $15 per 1M characters, with no annual contract and no concurrency tier to buy. For developers already using AssemblyAI speech-to-text, it closes the voice loop with one vendor. TL;DR Size: It is a hosted AP
Get smart on it
A text-to-speech API has been released that converts written text into spoken audio for voice agents used in live phone calls. The service costs $15 per 1 million characters with unlimited concurrent requests and no contract requirements. Performance testing shows it achieves 93.7% accuracy on difficult targets like phone numbers and codes, with a 47 millisecond delay before audio begins, though independent benchmarks report mixed results compared to competing services. The API supports 4,000+ voices, instant voice cloning, and six languages at launch.
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