CompanyOpenAI

OpenAI unveils GPT-6 Astra and GPT-6.1 Terra

Original title: DevDay 2026 Recap

Plain language

What it is: OpenAI announced over 20 updates at DevDay 2026, including new models like GPT-6 Astra and GPT-6.1 Terra, and tools for ChatGPT and Codex. They also introduced agents that can handle ongoing responsibilities and a partnership with Oracle to bring its apps to ChatGPT.
How it works: Developers can launch native experiences directly in ChatGPT, which serves as a shared space for collaboration between humans and agents. The source does not explain the specific technical workings of the new models or agents.
Where it is available: These updates apply to ChatGPT, Codex, and OpenAI APIs.
Example: Developers can launch new native experiences directly to ChatGPT users, or use Oracle apps within ChatGPT.

What it is: OpenAI announced DevDay 2026 updates including GPT-6 Astra, GPT-6.1 Terra, the Decisions API, and new tools for Codex. They also opened ChatGPT as a shared surface for human-agent collaboration.
How it works: Developers can build with Codex and the API, customize ChatGPT with plugins, and use the Decisions API to build responsive apps. ChatGPT now acts as a shared surface where developers can launch native experiences.
Where it is available: The updates are available across ChatGPT, Codex, and OpenAI APIs.
Example: Developers can build responsive applications using the Decisions API, or launch native experiences directly to ChatGPT's weekly users.

The headline and explanation on this page are based on OpenAI's post. The full details are in the original.

DevDay 2026 Recap