OpenAI has unveiled a preview of the ChatGPT app for Windows, currently accessible to Plus, Team, Enterprise, and Edu users. The app allows users to engage with files and photos while incorporating the latest model advancements, including access to OpenAI's o1-preview. Although the app is compatible with most Windows 10 machines, it lacks voice support and certain GPT Store integrations. OpenAI plans to roll out a more comprehensive experience later this year, promising improvements and expanded functionality.