Is decoding the same thing as generating an answer?
No. Generation selects a sequence of token IDs using the model and decoding strategy. Tokenizer decoding converts that selected sequence into a readable string.
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Some tokens represent incomplete byte sequences or depend on surrounding pieces for spacing. Decoding the sequence together helps reconstruct characters and boundaries correctly.
Only if the tokenizer preserved that information during encoding and the decoder retains it. A tokenizer that lowercases input cannot automatically recover the original capitalization.
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