This is your money superpower. Paste any prompt, add documents, pick a model, and this register tells you exactly what one call costs — and what 1,000 calls cost. After today you can price ANY chatbot or feature.
A real request is more than your question. It bundles the system prompt, your message, any documents, and reserves room for the answer. Every piece is billable input (except the answer, which is output). Edit anything — the register updates live.
Stuffing a giant document into every call is the #1 way people accidentally spend a fortune. Tap to jam ~8,000 tokens of "reference" into the doc box, then watch the register — and check if it even fits the model.
Your app will run the current call 10,000 times a day. Your boss says keep it under $5/day. Pick the cheapest model that (a) fits the call in its context window and (b) stays under budget. Get it right to win!
Your register is the real thing. Pros then add these money levers on top:
Count tokens × price to predict cost. ✅ Plan budgets up front. ⚠️ It's an estimate until the call runs.
Reuse an unchanged prompt prefix at a discount. ✅ Huge savings on repeated system prompts/docs. ⚠️ Needs stable prefixes.
Non-urgent jobs run cheaper in batches or on smaller models. ✅ Big discounts. ⚠️ Slower or slightly less capable.
You built the AI Cash Register. You can now price any AI call: add up system + message + documents for input, add the expected output, run each side through tokens × price ÷ 1,000,000, and multiply by how often it runs. That's a real professional skill.