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Topics/Tokenization/Bos

Bos

Subtopic3 questions

Questions tagged with Bos — part of Tokenization.

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BOS, EOS, PAD: why do tokenizers reserve these ids instead of using normal text?
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What are BOS, EOS, PAD, and role marker special tokens, and what happens when each is missing or duplicated?
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What failure mode occurs when a developer duplicates the BOS token by prepending it manually while also using apply_chat_template?
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