1.03
Which Claude
There is more than one Claude, and they trade thinking against speed.
Claude Code shows which one you are on at the bottom of the prompt box, and /model switches it and keeps your choice for new chats.
Haiku
quick and cheap
Sonnet
the everyday one
Opus
thinks hard
Drives on Pro
Fable
thinks hardest
Drives on Max
QuickerThinks harder
The model
What it is for
Haiku
The quick cheap one, for small mechanical jobs where the thinking is already done.
Sonnet
The everyday one. Fast, and good enough for nearly all of it, so it is the one the driver hands work to later in the course.
Opus
Thinks hard at a price most people can run all day. On the Pro plan this is the one that drives.
Fable
The biggest, and the slowest and dearest, for the work where judgement matters most. On the Max plan this is the one that drives.
Set it once and leave it.
Opus if you are on the Pro plan, and Fable if you are on the Max plan.
As you go up the list each one uses more tokens for the same question, though the cleverer one often gets there in fewer goes.
Later in the course we will go through how to get the main, bigger model to hand work on to the smaller models.
How hard it thinks is a separate dial, and the next part is that.