LLM Learning Hub

workspace/llm-course/home

Token Count

Token count is the number of tokens a piece of text produces after tokenization. It determines sequence length, compute cost, and context-window consumption for a given input.

What is Token Count?

Token count is the number of tokens a piece of text produces after tokenization. It determines sequence length, compute cost, and context-window consumption for a given input.

Token count is the number of tokens a piece of text produces after tokenization. It determines sequence length, compute cost, and context-window consumption for a given input.

Where is it used?

LLM APIs bill per token; GPT-4 has a 128k context window; estimating token count before sending prompts prevents truncation and controls cost in production.

How to build it

Use `len(tokenizer.encode(text))` to count tokens, build a cost estimator that multiplies token count by price per token, and test how token count varies across languages.