> For the complete documentation index, see [llms.txt](https://docs.layerlens.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.layerlens.ai/more-in-this-section-7/optimize-judge-gepa.md).

# Optimize a judge with GEPA

Guide — optimize a judge with GEPA.

See [Tutorial 5: GEPA-optimize a judge](/9.-improve-tune-the-system/05-gepa-optimize.md) for the full walkthrough.

Quick checklist:

* ≥30 labeled examples
* Held-out validation set
* Run GEPA → check before/after agreement
* Validate on holdout
* If holdout much lower → over-fit; expand training set

## See also

* [Concept: Judges](/8.-evaluate-score-the-outputs/judges-1.md)
* [Judge optimization (Premium)](/9.-improve-tune-the-system/judge-optimization.md)