Microsoft has added ChatGPT-o1 for all Copilot users, even on the free tier You'll find a new 'Think Deeper' button in Copilot to access it ChatGPT will be releasing the o3 reasoning model for free users in the coming days Mustafa Suleyman,

Microsoft is adding OpenAI’s o1 model to its Copilot AI experience as a feature called Think Deeper. It is available for free to all users with a Microsoft account.

You can turn on the o1 model by clicking on the Think Deeper button before submitting the request. As for why you might want to use Think Deeper, well it gives you access to the complex reasoning and searching that OpenAI's o1 model is capable of,

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On Thursday, Microsoft made one of ChatGPT's most impressive features free for all, releasing a new "Think Deeper" mode for Copilot, powered by OpenAI's o1 reasoning model.

However, Microsoft AI CEO Mustafa Suleyman revealed that all users of Copilot will be able to access OpenAI’s “world class o1 reasoning model”. While Copilot does have a paid Pro version, free users are also getting access to the new feature.

OpenAI's o1 reasoning model usually requires a costly subscription, but it's now free to all Microsoft Copilot users. This move follows a surge in popularity for Chinese AI app Deepseek and its free reasoning model earlier this week.