Gemini says: "It would cost approximately $6.25 to $30.00 to have Claude Opus 4.6 respond to 10,000 emails, assuming a typical 200-word input and 50-word output per email."
It's helpful with the actual technical changes needed, it just has no concept of what they translate to in the real world.
Btw my company is spending > $100/day in relatively cheap Gemini tokens for this work. It's easy to see why one might want to be cautious about exposing a token-burning service to the internet.