The first hit of AI is always free. The second, however...

Claude Sonnet 4.6 is so much better than GPT-5 mini that I figured I'd look up how much it'd cost to swap. Right now, for $10 a month, GitHub Copilot will let you use GPT-5 mini forever, no limit. Sonnet, however, was sucking down my monthly allocation of "premium requests" so fast (it's the end of the month, so I usually splurge on the model) I was scared to look at what it'd cost. Well be even…