A tokenizer is the component that maps text to token IDs and back according to a model’s vocabulary rules.
AI Glossary
Tokenizer
Coverage in development
A tokenizer is the component that maps text to token IDs and back according to a model’s vocabulary rules.
Definition
Plain English explanation
It is the dictionary and chopping rules that turn strings into numbers the model understands.
Related glossary terms
Last reviewed
Sources
- NIST AI Risk Management Framework — risk vocabulary context for AI systems
- Brel Digital company and technology profiles — applied usage evidence where tagged
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