Testing OpenAI's open source models

Ultra-fast voice agent with gpt-oss-120b, deployed locally with Cerebras AI and Vapi. TTFT latency 0.3–0.7 s for custom enterprise solutions.

domingo, 17 de agosto de 2025 • 3 min read • Q2BSTUDIO Team

Artificial-Intelligence-

voicegptoss

Voice Agent with gpt-oss-120b, OpenAI's open source model

We present an ultra-fast voice agent powered by the gpt-oss-120b model, running locally with Cerebras AI acceleration and Vapi integration. Designed for real-time conversations with a Time To First Token (TTFT) between 0.3 and 0.7 seconds, ideal for custom applications and enterprise AI projects.

Main features

Ultra-low latency with TTFT of 0.3 to 0.7 seconds

Local deployment for greater control and compliance

Cerebras AI acceleration for optimized inference

Vapi integration for voice interface and telephony

Real-time processing for AI agents with minimal delay

Performance and architecture

This system combines the gpt-oss-120b model with local infrastructure powered by Cerebras AI, optimizing latency and ensuring fast responses for critical applications. The local deployment approach reduces network hops and improves privacy and security, key aspects in cybersecurity projects.

Technological stack

AI model gpt-oss-120b, inference on Cerebras AI, Vapi voice platform, ngrok tunneling, Python backend, and local deployment with controlled public exposure. This combination facilitates the creation of custom software and AI agent solutions integrated with AWS and Azure cloud services when scalability is needed.

Requirements

Python 3.8 or higher, Git, ngrok account and installation, Cerebras AI API key, and a Vapi account. Recommended for teams developing custom applications and AI solutions for enterprises.

Quick start guide

Clone the repository, configure environment variables with the Cerebras AI key, authenticate ngrok to expose the local server, and run the application in Python. Connect the public URL in the Vapi dashboard as a webhook and test real-time calls to validate quality and latency.

Configuration and customization

Model parameters, response formats, webhook endpoints, and voice settings can be adjusted from the code. Ideal for creating custom software and tailored applications that require conversational AI agents and real-time analysis capabilities with Power BI integration for dashboards.

Performance optimization

Cerebras AI acceleration, local deployment, and optimized code help minimize latency. For enterprise projects, it is recommended to combine with AWS and Azure cloud services for load balancing, backups, and scaling of AI agents as demand grows.

Troubleshooting common issues

Authentication errors in ngrok are usually due to the tunnel token; for Cerebras key issues, check that it is in the environment file and that your account has sufficient credits; verify firewalls and that the webhook in Vapi matches the public ngrok URL.

Monitoring

Monitor TTFT metrics in console logs, usage and inference in the Cerebras AI panel, call quality in Vapi, and tunnel statistics in the ngrok panel. Integrate monitoring services and business intelligence services for dashboards and alerts.

Contributions and license

Contributions are welcome via Pull Requests. For major changes, open an issue to discuss the proposal. This project is licensed under the MIT license.

About Q2BSTUDIO

Q2BSTUDIO is a software development company specialized in creating custom applications and custom software for clients across various sectors. We are specialists in artificial intelligence, cybersecurity, and AWS and Azure cloud services. We offer business intelligence services, AI solutions for enterprises, conversational AI agents, and projects integrated with Power BI for visualization and reporting. Our approach combines technical expertise, cybersecurity best practices, and scalable architectures to deliver robust and personalized solutions.

Services offered by Q2BSTUDIO

Custom software development, creation of custom applications, integration of artificial intelligence into business processes, cybersecurity consulting, migration and management in AWS and Azure cloud services, implementation of business intelligence services, AI adoption for enterprises, design and integration of AI agents, and development of Power BI dashboards to improve decision-making.

Contact and support

If you need help integrating AI agents, designing custom software, or implementing artificial intelligence and cybersecurity solutions, contact Q2BSTUDIO. We can advise you from the concept phase to production deployment, optimizing costs, performance, and regulatory compliance.

Ready to get started

If you want to build the next generation of voice experiences with low-latency AI agents, apply our capabilities in artificial intelligence and custom software development. Q2BSTUDIO supports your project from idea to implementation, with expertise in cybersecurity, AWS and Azure cloud services, business intelligence services, AI for enterprises, AI agents, and Power BI to enhance your decisions.

OUR SERVICES

How we can help you

Do you have a project in mind?

Tell us your vision and we'll turn it into a software solution. Whatever the scope, we make your idea real.