The answer
An epoch is one complete pass through a training dataset. Large language model training may also be described by tokens processed or optimization steps.
What does it mean to train a neural network?
What is an epoch during training?
More FAQs in What does it mean to train a neural network?
Usually, answering a question uses existing parameters. Updating those parameters requires a separate training procedure, although a product may independently store conversation history or collect feedback.
Separate test data helps estimate performance on examples the model has not optimized against. Reusing test answers during development makes that estimate less trustworthy.
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