Though not as powerful as the full Deep Research, the new lighter version is available to all ChatGPT users, and it'll automatically kick in for paid subscribers once they hit their limit - no extra step required.

The tool built for creating in-depth reports in minutes is now available on all versions of ChatGPT, albeit in a new 'lightweight' form.

OpenAI announced that Deep Research based on ChatGPT o4-mini will be available to all Free users, while everyone else will get higher limits.