AI API guides: cost, tokens & practical how-tos

The fastest way to lose money on an AI API isn't the per-token price — it's sending more tokens than you need, on a pricier model than the job requires, without caching anything. These guides are the practical, numbers-backed playbook for spending less per request.

Each one ties to a working tool or live pricing data, so you can put real numbers on the advice: estimate spend with the cost calculator, compare models in the model directory, and see current per-token and cached rates on the pricing comparisons.