Surprised more comments aren't mentioning deepseek has this feature (for free) already. Assuming this is why OpenAI scrambled to release it.
The examples they have on the page work well on chat.deepseek.com with r1 and search options both enabled.
Do I blindly trust the accuracy of either though? Absolutely not. I'm pretty concerned about these models falling into gaming SEO and finding inaccurate facts and presenting them as fact. (How easy is it to fool / prompt inject these models?)
But has utility if held right.