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

OpenAI is introducing a new version of its ChatGPT deep research tool that it says is cheaper to operate. The “lightweight” model is available now to free users, as well as those on several of the company’s paid tiers.

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.