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OpenAI Pivots to a Platform at DevDay, Launches App SDK and Strikes Major AMD GPU Deal

Developers can start building apps inside ChatGPT today using a preview SDK.

Overview

  • OpenAI announced App SDK in preview to let developers create full app experiences inside ChatGPT, with app submissions for review opening later this year.
  • Live demos showed “talking to apps” and full‑screen experiences, including Coursera video playback, Canva design creation, and Zillow property search controlled by natural language.
  • New developer tools—AgentKit, ChatKit, and Codex—were introduced to enable agent workflows, chat interfaces, and coding support during the keynote.
  • OpenAI agreed to deploy 6 gigawatts of AMD Instinct GPUs over several years, and AMD issued OpenAI a warrant for up to 160 million shares tied to deployment and share‑price milestones.
  • DevDay 2025 hosted 1,500+ attendees at Fort Mason, with only the opening keynote livestreamed and the AltmanIve closing chat held exclusively in person.