I tried it [edit: on the default model when you open it] with a physics question which ChatGPT 4 got incorrect the first time, but was able to work out with some coaxing.
This got it (more) incorrect and then stuck to its guns, telling me my physics textbook was incorrect.
I tried a few more questions, each copied from earlier ChatGPT conversations. In general, I was extremely impressed by its speed, it's much faster than ChatGPT. That said, the quality of its answers, while good, frequently missed things, or got answers subtly wrong.
I tried it [edit: on the default model when you open it] with a physics question which ChatGPT 4 got incorrect the first time, but was able to work out with some coaxing.
This got it (more) incorrect and then stuck to its guns, telling me my physics textbook was incorrect.
I tried a few more questions, each copied from earlier ChatGPT conversations. In general, I was extremely impressed by its speed, it's much faster than ChatGPT. That said, the quality of its answers, while good, frequently missed things, or got answers subtly wrong.