Release notes

Select gpt-5.1, gpt-5, gpt-4.1 or gpt-4o directly in Telnyx with no external setup and a unified billing

Telnyx Assistants now let you set voice speed and adjust background audio volume to fine-tune scripted calls and branded voice flows.

Review AI Assistant call recordings and transcripts in a single view to improve debugging and QA for voice assistants.

AI Assistants on Telnyx now support GPT-5.1, improving response quality and reducing latency for multi-turn voice workflows.

We’re excited to announce a new integration between Telnyx Voice AI Agents and Sabre, a leading software and technology provider for the global travel industry.

Telnyx’s importer now handles Retell multi-state agents as native multi-assistant graphs, improving workflow stability and context continuity.

We're continuing to grow where it counts. Telnyx has officially added local outbound voice capabilities in Kuwait, Ukraine, and Russia bringing our total coverage to 84 countries with 2-way voice....

Telnyx now hosts Deepgram’s Flux Conversational Speech Recognition model inside its global network. Running Flux at the edge eliminates public cloud hops, enabling sub-second transcription and faster...

We’ve simplified and accelerated speech recognition for AI Assistants by enabling native Azure Speech-to-Text (STT) support, no customer API key required.

See abandoned outbound traffic at a glance in the Mission Control Portal. This metric helps you spot problematic traffic quickly so you can reduce wasted spend and take corrective actions.

Telnyx’s NaturalHD voices now generate Arabic speech directly from unvowelled script while still supporting explicit diacritics when needed. With new voices “haqq”, “qadir”, “layla”, “shams”,...

Telnyx has added new business registration fields to the Toll-Free Verification process via Portal and API. Get ahead of 2026 carrier requirements with stronger submissions.