Release notes

Rime Coda brings higher-quality multilingual text-to-speech to Telnyx, with expanded voice coverage for Hindi, Arabic, Portuguese, Spanish, and more.

GPT-5.4 is now generally available as a reasoning model for Telnyx Voice AI Assistants, adding OpenAI latest generation model to the on-network inference layer.

Speechmatics STT is now available in Mission Control, Voice API, and WebSocket transcription, with real-time interim results for live voice workflows.

Premium Answering Machine Detection (AMD) now detects iOS Call Screening, including iOS Live Voicemail, in real time during outbound calls.

Telnyx adds a Dubai, UAE anchorsite for SIP connections, expanding local voice anchoring to the Middle East.

Ultra voices now deliver expressive pacing, clean audio, natural alphanumeric handling, and context-aware pronunciation across all languages.

A new Inference Usage Dashboard in the Mission Control Portal shows per-model breakdown of inference consumption alongside existing assistant usage metrics.

AssemblyAI Universal-Streaming is now available as a speech-to-text option through the Telnyx STT API and Mission Control, adding low-latency transcription with built-in turn detection for voice...

Telnyx AI Assistants now support end-user targeting in traffic distribution, so you can route specific callers or destinations to a test version before rolling out to everyone.

xAI Grok voices and transcription are now available through the Telnyx TTS and STT APIs, extending Grok support beyond Voice AI Assistants to standalone API usage.

Telnyx AI Voice Agents can now register as SIP endpoints on existing enterprise voice systems, so teams can route calls through the dial plans, queues, and internal extensions they already operate.

Telnyx AI Assistants can now invite participants into a live call and manage turn-taking across multiple speakers. The assistant knows who is speaking, stays silent when people talk to each other,...