Comment by ddjohnson

One of the blog post authors here! We evaluated o3 through the API, where the model does not have access to any specific built-in tools (although it does have the capability to use tools, and allows you to provide your own tools). This is different than when using o3 through the ChatGPT UI, where it does have a built-in tool to run code.

(Interestingly, even in the ChatGPT UI the o3 model will sometimes state that it ran code on its personal MacBook Pro M2! https://x.com/TransluceAI/status/1912617941725847841)