OpenAI releases GPT-6.1 Sol, Astra ultrafast, and new collaboration tools at Dev Day 2026
TLDR
Lenny's Newsletter covered OpenAI's Dev Day 2026, where the company unveiled new tools including Dots, Spaces, Sites, GPT-6.1 Sol, an updated Decisions API with vision capabilities, and Astra ultrafast.
Optimixed Overview
Optimixed's original report on this story.
At OpenAI's Dev Day 2026, the company released several developer-focused announcements, including Dots (a new ChatGPT feature), Spaces for human-agent collaboration, and Sites with connectors for sharing internal tools. GPT-6.1 Sol joins the model stack as a faster, more cost-efficient option. The Decisions API now includes vision capabilities, and Astra ultrafast enables real-time interactive experiences—though performance and pricing vary by use case. Lenny's Newsletter tested several tools early, including interactive sketching and 3D world redesign, to assess their practical utility for developers.