Lesson 1470 of 1596
Reasoning About Cost Per Task, Not Per Token
Compare model families on full-task cost including retries and context.
Creators · Model Families · ~7 min read
The premise
Per-token price is misleading. The fair comparison is cost to complete one user task end-to-end, including context, retries, and tool calls.
What AI does well here
- Sum input plus output tokens per call.
- Aggregate spend by feature or user with tracing in place.
What AI cannot do
- Predict cost without running on representative traffic.
- Account for cost shifts when you change prompts.
Key terms in this lesson
Practice this safely
Use a small project example from your own work. The useful move is to compare the AI's draft against your goal, sources, and constraints before you trust it.
- 1Ask AI to explain cost in plain language, then underline anything that sounds uncertain or too broad.
- 2Give it one detail from "Reasoning About Cost Per Task, Not Per Token" and ask for two possible next steps plus one reason each step might be wrong.
- 3Check tokens against a trusted source, teacher, adult, expert, or original document before you use it.
End-of-lesson quiz
Check what stuck
10 questions · Score saves to your progress.
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