How OpenAI’s DevDay 2025 Revolutionizes AI Development with Agent Builder and ChatGPT Apps

OpenAI’s DevDay 2025 unveiled a groundbreaking shift in AI development: the arrival of AI tools that build other AI tools and the ability to craft AI agents and interactive apps directly inside ChatGPT. This event marks a pivotal moment where the barrier for creating advanced AI workflows plummets, empowering founders, developers, and professionals to innovate faster than ever.

AI Building AI: The Dawn of a New Development Era

The headline innovation is Codex, an AI coding agent that contributed to writing 80% of OpenAI’s new Agent Builder tool in less than six weeks. Codex acts as a true AI coworker—coding alongside developers, writing its own tests, and reviewing code changes. It integrates seamlessly with platforms like Slack, allowing users to assign coding tasks simply by tagging @Codex.

This self-improving ecosystem—where AI tools help build better AI tools—is accelerating development speed exponentially. As OpenAI’s senior engineer demonstrated during the keynote, voice commands enabled Codex to instantly code a complex app that controlled professional-grade camera and stage lighting equipment. Another developer visually designed and deployed a customer service AI agent in just eight minutes using the new no-code Agent Builder.

AgentKit: No-Code AI Agent Creation Made Simple

AgentKit includes a visual canvas, called Agent Builder, enabling users to drag and drop components, composing multi-agent workflows without writing backend code. This is a game-changer for startups and enterprises aiming to prototype complex, multi-step AI workflows with minimal engineering overhead.

Imagine building AI systems the way you might map a flowchart, dramatically reducing development cycles from months to a weekend hackathon. This democratizes AI application development, opening the door to more AI-native companies and solutions.

Apps Inside ChatGPT: Transforming the AI Experience

Another major advance is the introduction of an Apps SDK that lets developers embed interactive user interfaces, such as maps, order forms, or video players, directly inside ChatGPT conversations. This means users can engage with dynamic, app-like experiences seamlessly during chat interactions without switching platforms.

This integration transforms ChatGPT from a conversational AI into a versatile app platform, delivering both AI intelligence and rich functionality in one place.

What This Means for You and Your Business

For founders and creators, these tools lower the technical barrier, speeding iteration and experimentation. Early adopters can now leverage the power of AI agents built visually without the need for extensive coding expertise.

Professionals in any sector should view this as a shift towards AI system design. Your role is moving from task execution to architecting AI workflows that automate repetitive work—be it research, reporting, or project management. Experimenting with tools like Agent Builder to automate small personal or business tasks can yield immediate productivity gains.

AI's Disruptive Power on Jobs and Industry

The surge of innovation comes with societal challenges. A recent Senate report warns that AI and automation could displace nearly 100 million U.S. jobs over the coming decade, with roles in fast food and accounting particularly vulnerable. This underscores the urgency for businesses and workers alike to adapt and find new value in evolving AI-driven landscapes.

At the same time, partnerships like AMD’s 6-gigawatt computing supply to OpenAI showcase the enterprise-scale commitments powering these advancements. Innovations such as DeepMind’s CodeMender, which autonomously patches software vulnerabilities, exemplify AI’s expanding capabilities beyond traditional coding tasks.

Leida’s Role in Your AI Journey

Navigating this AI revolution requires expert guidance to implement solutions strategically. Leida specializes in discovering where AI can unlock efficiency and growth in your operations, from automating workflows to integrating AI-powered customer experiences. As AI evolution multiplies development speed, staying ahead means knowing where and how to deploy these tools effectively.

If you want to find out where your business could be saving time and cutting costs, let’s talk — book a call today.