LLamaSharp/docs/LLamaContext/tokenization.md

Tokenization/Detokenization

A pair of APIs to make conversion between text and tokens.

Tokenization

The basic usage is to call Tokenize after initializing the model.

LLamaModel model = new LLamaModel(new ModelParams("<modelPath>"));
string text = "hello";
int[] tokens = model.Tokenize(text).ToArray();

Depending on different model (or vocab), the output will be various.

Detokenization

Similar to tokenization, just pass an IEnumerable<int> to Detokenize method.

LLamaModel model = new LLamaModel(new ModelParams("<modelPath>"));
int[] tokens = new int[] {125, 2568, 13245};
string text = model.Detokenize(tokens);