Thanks everyone for all the kind words and feedback. Super happy that you are enjoying Build a Reasoning Model (From Scratch)!

Unfortunately, there's small typo in listing 6.5 on page 198 (see video below). The line "torch.manual_seed(0)" should be "torch.manual_seed(5)".

This is a tiny change, but it's needed to reproduce the generated response in listing 6.5 and the corresponding log-probability outputs later in Chapter 6. If you use 0, the code is of course still correct but the numeric results may be a bit different, which could be confusing. Anyway, it should be a small 1 character change :).

This will be fixed in the next printing.

I am sorry about the oversight, and I hope this note saves you some debugging time.