OpenAI just made your entire tech stack obsolete...
Watch on YouTube ↗ Summary based on the YouTube transcript and episode description.
Fireship breaks down OpenAI DevDay 2025: ChatGPT Apps SDK, Agent Kit, Codex GitHub Actions, and GPT-5 Pro API access.
- ChatGPT now has 800 million weekly active users, making its new Apps platform a major distribution opportunity for developers.
- Sora 2 API costs $0.50 per second of high-quality video, roughly $1,800 for a one-hour output.
- OpenAI released a GitHub Action for Codex that auto-reviews PRs for code quality and security flaws.
- Agent Kit is a flowchart-style no-code canvas for building and deploying agents, positioned as a direct n8n competitor.
- GPT-5 Pro and Sora 2 are now both available via the OpenAI API.
- Two new smaller, cheaper models added for voice and image generation use cases.
- ChatGPT Apps is OpenAI’s third attempt at a plugin/extension platform after GPT Plugins and GPTs both failed.
- No-code agent tools like Agent Kit have a complexity ceiling that eventually forces a full rewrite in real code.
2025-10-07 · Watch on YouTube
