OpenAI DevDay 2026: Dots, GPT-6.1 Sol, Ultrafast and more platform updates

[AINews] OpenAI DevDay 2026: Dots, 6.1 Sol, Ultrafast, Decisions API, Agents API, Spaces, Marketplace, and 1.2 Billion ChatGPT WAU

At DevDay 2026 OpenAI announced Dots, a persistent agent, plus GPT-6.1 Sol, an Ultrafast mode, a Decisions API, ChatGPT Spaces and a Marketplace. The company also said ChatGPT has reached 1.2 billion weekly active users.

Why it matters: It rounds up every DevDay 2026 launch alongside third-party benchmark data, so the product line and pricing changes are visible in one place.