Sam Witteveen · 2026-09-30 · notable
Sam Witteveen — 'OpenAI DevDay - What Actually Matters for Builders'
Sam Witteveen's 30 September 2026 video goes through OpenAI's DevDay announcements for developers, from Dots and the Agents and Decisions APIs to GPT-6.1 Sol pricing, Codex in the cloud and Ultrafast.
Sam Witteveen sorts OpenAI's DevDay 2026 news by what it means for people building apps.
What is it?
'OpenAI DevDay - What Actually Matters for Builders' went up on Sam Witteveen's channel on 30 September 2026, the day after OpenAI's DevDay keynote. Witteveen says the video looks at what the announcements show about where OpenAI, and the industry as a whole, may be going.
How does it work?
The chapters start with Dots, OpenAI's always-on agents, including how they run on Astra and how usage is billed. The video then covers the Agents API, the Decisions API, Luna image support, GPT-6.1 Sol pricing, cache pricing for agents, Codex in the cloud and in voice, computer use and Codex Security, and Ultrafast. It ends with plugins, the Apps SDK, Sign in with ChatGPT and the OpenAI Marketplace.
Why does it matter?
DevDay shipped more than 20 announcements in one keynote. A single walkthrough ordered by developer impact helps builders see which API and pricing changes affect their apps before reading each launch post.
Who is it for?
developers building on OpenAI's platform