This is more expensive, but it also looks like it's better enough that it's far more useful.

I also won't be surprised if you look at cost per completed task + wall clock time that it comes out ahead for the majority of what you'd want to actually use it for.

Luna will still be a great option for doing non-engineering tasks super cheaply.

For prompts over 100k tokens it's 5 times more expensive - $0.50 in, $2.50 out.