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.

Microsoft is bringing OpenAI’s o1 reasoning model to all Copilot users this week. You won’t need to subscribe to a $20 monthly Copilot Pro or ChatGPT Plus plan to get it either, as Microsoft is making it free for all users of Copilot.

Microsoft AI CEO Mustafa Suleyman announced that Copilot users will now have free access to Think Deeper. The feature includes access to OpenAI's o1 reasoning model's capabilities across math, science,

Initial reports suggested that access to the o1 reasoning model in Copilot was unlimited, but this has proved to be false, with several users coming up against usage limits. In response Microsoft then upped the usage limit, with the Copilot account on X yesterday announcing: “Think Deeper limits for free and Pro subscribers have been expanded!”

Microsoft is making its AI assistant, Copilot, more intelligent and accessible by integrating OpenAI's o1 reasoning model for all users-without requiring a paid subscription. Previously available only to Copilot Pro and ChatGPT Plus subscribers, this advanced AI reasoning model is now free for every Copilot user.

Initially, the model of reasoning OpenAI o1 was launched as a paid feature of the tariff Copilot Pro for $20 per month, but this week Microsoft made i