Painful lesson: I burned 85% of my free Binance AI Pro credits with one simple prompt!

Binance gives free users 250,000 credits a month. I picked Claude Sonnet 5.5 because it's the smartest, without checking the number next to it: 2.79X. GPT 6 Luna is 0.09X.

211,629 credits gone in a single prompt.

Don't be like me. Here's how I pick a model now:
- Simple task (rewrite, summary, quick question): the cheapest model
- Medium task (research, comparing options): a mid-priced one
- Hard task (long analysis, multi-step reasoning): the expensive one, only when the cheap one fails