Release notes

The Telnyx Email API is now available in beta, bringing transactional and marketing email to the same platform as SMS, voice, and WhatsApp. One API key, one dashboard, one bill.

Kimi K3, Moonshot AI's 2.8-trillion-parameter flagship model, is now available on the Telnyx Inference API. First open-source model in the 3T class with 1M context, native vision, and configurable...

GPT-5.4-mini is now available as an LLM model option for Telnyx Voice AI Assistants, adding OpenAI's compact high-efficiency model to the provider catalog for production voice workflows.

Personalize voicemail greetings on Telnyx phone numbers with custom TTS messages or uploaded audio files, configured per number via Mission Control Portal or API.

Self-hosted multilingual speech-to-text with automatic language detection across 25 European languages, running on Telnyx infrastructure.

Fish Audio TTS is now available for Telnyx Voice AI, adding expressive multilingual speech with inline emotion control to the voice provider catalog.

Two new built-in insights score how well your AI Assistant follows instructions and how satisfied callers are, with no custom prompt engineering required.

Telnyx now offers United Arab Emirates as a data storage location and as an inference region. Store call recordings, transcripts, AI data, and usage logs in UAE infrastructure, and run open-weight...

AI Assistants can now call functions that run directly in the browser during a voice or chat conversation, with access to browser state, local data, and session-authenticated APIs without a webhook.

Voice AI Assistants can now tune how confident they must be that a caller genuinely wants to interrupt before stopping, so backchannels like "yeah" or "uh-huh" no longer cut the assistant off...

Define what your AI Assistant says to callers while a webhook tool call is executing, so callers never sit in silence.

Telnyx Voice AI now includes Arabic speech-to-text and text-to-speech model options for Arabic-speaking customer interactions.