Grokking the AI System Design Interview
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Capstone: The Inference Bill
Know the Vocabulary
This lesson uses the terms below many times. Read them once now, and come back here when a later section needs one.
- Token: The unit of text a large language model (LLM) reads, writes, and is billed in. One token is about three quarters of an English word.
- Input tokens and output tokens: Input tokens are everything sent to the model for one request. Output tokens are the tokens it writes back. Providers price the two separately, and output tokens usually cost more.
- Frontier model: The most capable and most expensive class of model a provider offers.
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