
AssemblyAI
The best way to build Voice AI apps with one robust API
4.8•25 reviews•6.3K followers
The best way to build Voice AI apps with one robust API
4.8•25 reviews•6.3K followers
Build new AI products with voice data leveraging AssemblyAI’s industry-leading Voice AI models for accurate speech-to-text, speaker detection, sentiment analysis, PII redaction, streaming speech recognition and more.
Join 5,000+ industry-leading companies, including Fireflies.ai, Glean, and Calabrio, unlocking the power of voice data and launching best-in-class products and experiences.
This is the 7th launch from AssemblyAI. View more
Universal-3 Pro
Launching today
Universal-3 Pro is a new class of speech language model built for Voice AI. Control transcription using instructions and domain context like names, terminology, and topics to get accurate output at the source. No custom models, no post-processing pipelines, no hallucinations. Includes 1,000 keyterms, audio tagging, and 6-language code-switching for $0.21/hr.







Free Options
Launch Team






AssemblyAI
Congrats on the launch — love the developer-first Voice AI platform and robust API.
In AssemblyAI's Universal-3 Pro (promptable speech language model), what's fixed vs prompt-controlled in the API for keyterms prompting and speaker roles? That split keeps outputs predictable and avoids invented words, so teams can drop brittle cleanup code.