Transformers documentation

Tiktoken and interaction with Transformers

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Tiktoken and interaction with Transformers

Support for tiktoken model files is seamlessly integrated in 🤗 transformers when loading models from_pretrained with a tokenizer.model tiktoken file on the Hub, which is automatically converted into our fast tokenizer.

Known models that were released with a tiktoken.model :

  • gpt2
  • llama3

Example usage

In order to load tiktoken files in transformers, ensure that the tokenizer.model file is a tiktoken file and it will automatically be loaded when loading from_pretrained. Here is how one would load a tokenizer and a model, which can be loaded from the exact same file:

from transformers import AutoTokenizer

model_id = "meta-llama/Meta-Llama-3-8B-Instruct"
tokenizer = AutoTokenizer.from_pretrained(model_id, subfolder="original") 
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