GEPAzilla happily smashing prompts in the GEPA reactor core
Meet GEPAzilla

Prompt Optimization with GEPA

The open-source GEPA prompt optimizer. Feed GEPAzilla a dataset and it will chew through prompts, score them with custom metrics, and spit out the strongest contender—feng shui for your system prompt.

Bring your dataset

Load your own rows or start with data/sample-dataset.json to see GEPAzilla in action.

Composable scoring

Mix deterministic checks with LLM judges. Weight and duplicate scorers to match your eval stack.

Local telemetry

Every span stays on your machine—tokens, routing, costs, and errors are yours to inspect.