Tuesday, October 7, 2025

OpenAI DevDay: Launching ChatGPT Apps, Introducing AgentKit, and Announcing GA Release of Codex

OpenAI’s annual Developer Day unveiled significant updates, including new ChatGPT apps and an SDK for developers. Major companies like Booking.com, Canva, and Spotify have already launched apps that integrate seamlessly with ChatGPT. Users can invoke these apps simply by mentioning their names in prompts, allowing for streamlined requests—a feature that also includes relevant suggestions from ChatGPT. The first app use requires user approval for data sharing.

Additionally, OpenAI introduced AgentKit, which simplifies the process of building and optimizing agents through tools like Agent Builder and ChatKit, reducing the complexity and time involved. Enhancements to the evaluation framework now include datasets, trace grading, and automated prompt optimization. The general availability of Codex, featuring a new SDK and Slack integration, highlights its rapid adoption by developers. OpenAI also announced enhanced API access, supporting GPT-5-pro and Sora 2/Sora 2 Pro, solidifying its role in innovative AI solutions.

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