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OpenAI

OpenAI DevDay 2025

It’s the best time in history to be a builder. This year, we introduced the next generation of tools and models to help developers code faster, build agents more reliably, and scale their apps in ChatGPT.

  • 4M

    developers have built with OpenAI

  • 800M+

    weekly ChatGPT users

  • 6B

    tokens per minute on the API platform

Product announcements

White icon of a stacked layers symbol, representing apps or modular tools, centered on a green and blue gradient background.

Apps in ChatGPT

Chat with apps directly in ChatGPT and build them with the Apps SDK in preview.

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White icon of a branching node diagram, representing an agent or workflow system, centered on a soft orange and blue gradient background.

AgentKit

Build with our toolkit for production-grade agents.

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Sora icon of a cartoonish white cloud with big, expressive eyes centered on a dark starry blue background, evoking personality or playfulness.

Sora 2 in the API

Integrate video generation into your app with our latest Sora model.

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White icon of a clock face with a terminal prompt arrow, symbolizing Codex or command-line execution, on a vibrant blue and purple gradient background.

Codex 

Check out new features like a Slack integration, Codex SDK, and enterprise controls in Codex—now generally available.

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White square with a large black “5” and the word “Pro” beneath it, representing GPT-5 Pro, on a bright orange and pink gradient background.

GPT-5 Pro in the API

The smartest model in the API for tasks where precision matters.

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White icon of a sound waveform representing real-time voice or audio interaction, set against a blue and purple blurred background.

gpt-realtime-mini

A smaller voice model that’s 70% less expensive than the large model.

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White icon of overlapping image frames, suggesting image generation or media tools, on a warm yellow and blue gradient background.

gpt-image-1-mini

A smaller image generation model that’s 80% less expensive than the large model.

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Sessions at OpenAI DevDay