---
title: Telnyx VoiceAI Assistants with GPT-5.2 Model Support
canonical: https://telnyx.com/release-notes/voiceai-assistants-gpt-5-2
---
# Telnyx VoiceAI Assistants with GPT-5.2 Model Support

[Release notes](https://telnyx.com/release-notes)

# GPT-5.2 integration in Telnyx VoiceAI Assistant

### 11, Dec 2025

Telnyx VoiceAI Assistants now support OpenAI’s GPT-5.2 model, giving developers access to the latest generation of frontier LLM capabilities for real-time telephony-centric voice applications.

This integration enhances intelligence and flexibility in multi-turn conversational workflows while addressing real-world performance needs.

## What’s new

* **GPT-5.2 model support:** Select GPT-5.2 in the AI Assistant model picker or via API.
* **Extended context:** Bigger context handling for more complex dialogs and history.
* **Fallback routing:** Developers can configure automated model mode switches based on task complexity.
* **Unified billing:** Usage of GPT-5.2 through Telnyx bills at consistent pricing without separate API billing.

## Why it matters

* Improves reasoning and long-context understanding for multi-turn conversations.
* Offers configurable performance profiles so teams can optimize for latency or depth.
* Reduces retries and custom prompt logic in pipeline workflows.
* Enables handling large task contexts (documents, histories) without fragmenting user state.

## Example use cases

* **Contact center assistants** that require consistent handling of multi-step support flows.
* **Enterprise knowledge bots** that use extended context for policies, contracts, or manuals.
* **Interactive IVRs** that combine natural language with backend system lookups.

## Getting started

1. Open the Mission Control Portal and go to **AI Assistants**.
2. Edit or create an Assistant and choose **GPT-5.2** in the model configuration.
3. Optionally choose Instant, Thinking, or Pro to tailor latency vs. reasoning effort.
4. Test end-to-end dialogs in the Assistant Builder before deploying.
5. Monitor interaction latency and intent accuracy via Conversation History.

Log in to the [Mission Control Portal](https://portal.telnyx.com), navigate to AI Assistants, and set the maximum assistant duration as required.

[Start building](https://telnyx.com/sign-up)

### Ask AI

* [![GPT](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/chatgpt_icon-ea55e09d.jpeg?width=92&format=webp)](https://chat.openai.com/?q=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.)
* [![Claude](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/claude_icon-c7c8eef3.webp?width=92&format=webp)](https://claude.ai/new?q=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.)
* [![Perplexity](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/perplexity_icon-cd5b74f1.webp?width=92&format=webp)](https://www.perplexity.ai/search?q=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.)
* [![Gemini](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/gemini_icon-4ff1cbf4.webp?width=92&format=webp)](https://www.google.com/search?udm=50&aep=11&q=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.)
* [![Grok](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/grok_icon-e588e5bd.webp?width=92&format=webp)](https://x.com/i/grok?text=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.)