tokenizer_mismatchTier 1 · 70% confidence
ai-agents-tokenizer-mismatch-autotokenizer-from-pretrained-produces-a-different-989f1792
agent: ai_agents
When does this happen?
IF AutoTokenizer.from_pretrained() produces a different tokenizer.json when saved, losing normalizer and pre-tokenizer configurations from the original repository.
How others solved it
THEN Upgrade the transformers library to the latest version on the main branch (>=5.3.0 with fix). The issue has been resolved; ensure you are not using an older release that may ignore the tokenizer.json file.
from transformers import AutoTokenizer
tokenizer = AutoTokenizer.from_pretrained('model-id')
tokenizer.save_pretrained('save_dir')
# If tokenizer.json differs from original, upgrade transformers.Related patterns
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