Understanding AI Models: Fast, Smart, or Cheap?

There's a little dropdown at the top of your AI tool full of names that mean nothing, GPT-5.6 Thinking, Sonnet, Flash, Pro, so you take whatever's already selected and never think about it again.

That default is quietly costing you: the careful model you never use on the problems that need it, the fast one you trust on things it fumbles, the small free one you blame for "AI being dumb." This course fixes that in one move, it turns the whole confusing dropdown into two simple dials.

You'll learn what a "model" even is and why every brand ships a family of them, the difference between a fast model and a "thinking" one (and exactly when the wait pays off), why it sometimes seems to forget what you told it, how to read the model picker in ChatGPT, Claude, Gemini, and Perplexity, and what the free-versus-paid choice really comes down to.

The payoff is durable. Model names change every few months, the big tools have retired flagships just weeks after launch, but the two dials never change. By the end you'll read a dropdown you've never seen before and pick the right model on sight.

Who it's for

Anyone who takes the default: you've opened an AI tool, seen the model list, and picked nothing because the names were gibberish. This makes them obvious.

The "AI isn't smart enough" crowd: you may have judged the whole tool on its fast model and never flipped to the one that thinks.

Free-tier users deciding whether to pay: you'll know exactly which model your week needs, so the choice makes itself.