OpenAI Shutters Atlas Browser, Launches ChatGPT Chrome Extension, and Integrates GPT-5.6 into Microsoft 365 Copilot

OpenAI is undergoing significant changes, including discontinuing its Atlas browser to integrate agentic capabilities directly into ChatGPT and Codex. Concurrently, it is launching a ChatGPT Chrome extension for contextual browsing and making its latest GPT-5.6 model the preferred choice for Microsoft 365 Copilot, enhancing productivity tools.