tiktoken
Definition
tiktoken breaks text into tokens for supported language model encodings.
The library uses byte-pair encoding and maps text to token IDs. The appropriate encoding is crucial because token counts vary between models and texts.
Simply explained
Like a counter that splits text according to the units of a specific model.
Why it matters in practice
Token counting helps plan context length and API costs.
Example from business
Hypothetical example: A document service estimates before sending whether a text fits into the context window.
Limits and pitfalls
- Message envelopes and tool definitions can cause additional tokens; words are not a reliable token unit.
Origin & history
tiktoken is a tokenization tool published by OpenAI.
Use in mid-sized companies
- Partition documents and estimate request sizes in advance.
Frequently asked questions
Are ten words always ten tokens?
No, words can consist of multiple tokens.
Sources
- tiktoken · OpenAI: tiktoken –
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