OpenAI’s DevDay 2025 introduced new tools to help developers build and scale AI applications. Key announcements included:
- Apps in ChatGPT: Developers can now build and embed “apps” inside ChatGPT using a new Apps SDK.
- AgentKit: A toolkit to build production-grade agents with greater reliability.
- Sora 2 in the API: A new multimodal model that adds video generation capabilities.
- Codex updates: New features like a Slack integration, an updated SDK, and enterprise controls.
- GPT-5 Pro: A more powerful model optimized for tasks needing high precision.
- Smaller models for voice and image: “gpt-realtime-mini” for voice (lighter, cheaper), and “gpt-image-1-mini” for image generation (80 % cheaper than full model).
OpenAI also highlighted their scale: over 4 million developers, 800 million+ weekly ChatGPT users, and 6 billion tokens processed per minute on the API.