• AssemblyAI Universal-3-Pro is a sophisticated speech-to-text and voice understanding model aimed at production-grade Voice AI applications.
• The model is exclusively built on speech data for highly accurate transcription, speaker identification, and contextual audio analysis.
• Introduces instruction-based prompting, enabling developers to guide transcription using natural language without requiring model retraining.
• Enhances recognition of domain-specific terminology, formatting control, and conversational understanding, while ensuring deterministic transcript output.
• Aims to reduce hallucinations and boost reliability in challenging environments such as noisy calls, meetings, and multi-speaker scenarios.
• Designed for scalability within AssemblyAI's Voice AI infrastructure, providing predictable pricing and production-ready reliability.
• Supports seamless integration into enterprise-grade speech pipelines.
Instruction-based prompting for transcription control
High-accuracy speech recognition optimized for real-world audio
Speaker identification and contextual audio understanding
Reduced hallucinations through speech-focused training
Domain customization using natural language prompts
Support for keyterm prompting and specialized vocabulary
Deterministic transcript output suitable for compliance workflows
Multichannel and complex audio handling
Scalable voice AI infrastructure with predictable pricing
Production-ready performance with low word error rates
What makes Universal-3-Pro different from traditional speech-to-text models?
It is trained exclusively on speech data and supports instruction-based prompting, enabling highly controlled and reliable transcription outputs.
Can developers customize transcription behavior?
Yes. Natural language prompts allow customization without retraining models, improving domain accuracy and formatting.
Does it reduce hallucinated content?
Yes. The model is designed to minimize fabricated words by focusing entirely on transcription tasks.
Which languages are supported?
High-accuracy performance currently focuses on key languages such as English, Spanish, Portuguese, French, German, and Italian, with fallback options available through other models.
What types of applications benefit most?
Voice agents, call analytics, meeting transcription, compliance recording, and large-scale audio processing pipelines.