AssemblyAI

AssemblyAI

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
The first of its kind promptable speech language model
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.
Universal-3 Pro gallery image
Universal-3 Pro gallery image
Universal-3 Pro gallery image
Universal-3 Pro gallery image
Universal-3 Pro gallery image
Universal-3 Pro gallery image
Universal-3 Pro gallery image
Free Options
Launch Team
Threedium
Threedium
Image or Text to 3D Model
Promoted

What do you think? …

Meredith Rauch
We built Universal-3 Pro because we were tired of seeing developers spend 40% of their time on transcription workarounds instead of shipping features. Today, developers are stuck with rigid solutions. They can transcribe their audio, then run an increasingly complex pipeline of regex and LLM calls to extract what they need. Company names get mangled and jargon becomes gibberish. Then they have to build correction layers on top of correction layers. Worse..by the time they're fixing errors, they've lost acoustic information like tone, hesitation, and emphasis, that would have helped get it right in the first place. Universal-3 Pro fills this gap with the reliability of traditional ASR + the controllability of LLMs. Tell it "This is a medical consultation about diabetes management" and it optimizes for clinical terminology. Add your company's product names as keyterms and watch accuracy jump 45%. Tag [hold music] and [beep] so you're not transcribing phone system garbage. We're making it free to try - test it with your hardest audio and see the difference!
Zeiki Yu

Congrats on the launch — love the developer-first Voice AI platform and robust API.

Piroune Balachandran

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.