OpenAI DevDay 2025: ChatGPT Gets Apps, AgentKit, and Cheaper Models

At OpenAI DevDay 2025, the company unveiled a series of groundbreaking updates aimed at making ChatGPT more powerful, interactive, and developer-friendly. The announcements mark a major step toward transforming ChatGPT into a complete AI-powered operating system, integrating apps, tools, and real-time intelligence.

Unlike the previous year’s event, which was more focused on incremental updates, the 2025 edition introduced a range of features that enhance both user experience and developer opportunities.

ChatGPT Apps: Bringing Third-Party Services Inside the Chat

One of the biggest announcements was the introduction of apps within ChatGPT. OpenAI confirmed that users will now be able to access third-party services—such as Spotify, Zillow, and more—directly within the ChatGPT interface without needing to leave the platform.

These apps can appear as smart recommendations during a conversation or be invoked by name, responding to both text and voice commands. They also support interactive interfaces, allowing users to interact with app functions seamlessly inside the chat window.

OpenAI explained that developers can build these apps using the new Apps SDK, which is currently in preview mode. The feature will roll out to users on Free, Go, Plus, and Pro plans globally—except in the European Union for now.

AgentKit: A Toolkit for AI Developers

OpenAI also introduced AgentKit, a developer-focused toolkit that enables the creation of custom AI agents capable of performing tasks, integrating with APIs, and automating workflows. AgentKit empowers developers to build domain-specific tools and intelligent assistants powered by GPT models, bridging the gap between conversational AI and real-world utility.

This move positions OpenAI as a direct enabler of the next generation of AI-driven applications, giving developers more control over customization and deployment.

Cheaper and Faster GPT Voice Models

In addition to software enhancements, OpenAI announced two new real-time voice models designed to deliver faster response times and lower operating costs. These models aim to make voice-based AI interactions more accessible across industries, from customer support and education to entertainment and productivity tools.

By offering these models at reduced costs, OpenAI continues its strategy of scaling AI accessibility while maintaining performance and accuracy.

The Future of ChatGPT as an AI Platform

With these innovations, OpenAI is positioning ChatGPT as more than just a conversational assistant—it’s evolving into a comprehensive AI ecosystem. By blending third-party app functionality, developer extensibility, and affordable AI infrastructure, the company is paving the way for a new era where AI seamlessly integrates with everyday digital tasks.