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Release notes

Deepgram STT is now available across Telnyx Voice API and TeXML

2, Oct 2025

We’ve expanded our Deepgram integration to support both TeXML and the Voice API, so you can add high-performance speech-to-text to any voice workflow. This builds on top of our existing Deepgram integration and Telnyx AI Agent integration.

Deepgram is a leading name in speech-to-text (STT) technology and is trusted by top companies. Its low-latency, real-time transcription and multilingual support are built for production environments where speed and accuracy actually matter.

What’s new

  • Now compatible with Voice API and TeXML in addition to AI Agents
  • Real-time STT with support for 30+ languages and dialects

Key benefits

  • Accurate transcriptions even in noisy or variable environments
  • Ready for global use cases with built-in multilingual support

Why it matters

Whether you're building AI-powered phone agents or managing complex call flows over the Voice API, transcription quality is non-negotiable. This integration gives your team a direct path to enterprise-grade speech recognition. It’s a major step forward in delivering production-ready AI voice experiences at scale.

Getting started

For Voice API and TeXML:

  1. Sign up or log in to your Telnyx Mission Control Portal account.
  2. Configure your Voice API or TeXML
  3. Use the STT command and choose Deepgram as your STT engine
  4. Make a call to confirm real-time transcription is working as expected

For AI Agents:

  1. Sign in to your Telnyx Mission Control Portal
  2. Navigate to the AI, Storage and Compute → AI Assistants
  3. Create a new assistant
  4. Go to the Voice tab
  5. Under Transcription model, select Deepgram nova 2 or nova 3
  6. Test your agent directly in the builder

Explore the Telnyx developer docs for detailed instructions.