Training

Loss function

The formula that measures how wrong a model's predictions are during training; training tries to minimise it.

For language models the loss measures how surprised the model is by the actual next token. Lower loss on held-out text usually means a better model.

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Frequently asked questions

What does Loss function mean?

The formula that measures how wrong a model's predictions are during training; training tries to minimise it. For language models the loss measures how surprised the model is by the actual next token. Lower loss on held-out text usually means a better model.