Decoder. plain-English AI glossary

Self-distillation

▲ Rising

Also called Self-Distillation

A model teaching itself by training on its own best outputs, rather than learning from a bigger teacher.

Think of it like

Reviewing your own strongest essays and studying them to write even better ones next time.

Example

A model generates answers, keeps the ones a verifier approves, and fine-tunes on them — bootstrapping itself upward without a larger model.

How it actually works

Ordinary distillation transfers knowledge from a large teacher to a smaller student. Self-distillation drops the separate teacher: the model produces outputs, filters them for quality, and trains on the survivors, often over several rounds. It works because generating a good answer can be easier than learning to produce it consistently. Gains taper and can amplify the model's own biases, so filtering quality is everything.

For product teams

A way to improve a model without access to a bigger one — but it can entrench existing quirks.

For engineers

Train a model on its own filtered generations, iteratively, without a separate teacher network.

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