GEPA

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Freedom report

One barScore 5.3

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely0 of 6 device platforms
DocumentedPlans, terms and facts published

GEPA is ranked #16 of 29 in AI prompt generators on Freedom251. It runs on Self-hosted.

Compared on AI prompt generators

Model support: multiple
Optimization mode: automated
Prompt testing: Yes
API access: Yes

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The record

What it does: GEPA is an LLM-based text evolution engine for optimizing prompts, code, configurations, agent architectures, policies, and other text-representable artifacts.
Optimization method: It uses execution traces and evaluator-provided diagnostic feedback to guide LLM reflection, targeted mutations, and Pareto-aware candidate selection.
Framework flexibility: The optimize_anything API can work with any system through a user-written evaluator, without requiring DSPy or another framework.
Integrations: The project lists integrations with DSPy, MLflow, Comet ML Opik, Pydantic AI, OpenAI Cookbook, Hugging Face Cookbook, and Google ADK.
Built-in adapters: Built-in adapters include Default, Confidence, DSPy Full Program, Generic RAG, MCP, TerminalBench, AnyMaths, and LangChain adapters.
Model access: GEPA can optimize API-only models including GPT, Claude, and Gemini without requiring access to model weights.
Interpretability: GEPA provides human-readable optimization traces that show why prompts changed and can help debug agent behavior.
Budget controls: Users can cap metric calls and configure timeout, no-improvement, score-threshold, signal, file, and composite stop conditions.
Data needs: The FAQ says GEPA can show improvements with as few as three examples and recommends aiming for 30–300 examples for best results.
Use cases: The project highlights expensive rollouts, scarce data, API-only models, and a need for interpretable traces as situations where GEPA can be useful.
Notable limitation: GEPA does not inherently optimize for short prompts; its prompts may be longer unless prompt length is included as an optimization objective.
Support: The FAQ directs users to Discord, Slack, GitHub Issues, and the project lead’s X account for questions.
Security and compliance: The opened official pages provide no security or compliance certification claims.
Maker and origin: GEPA is developed at UC Berkeley Sky Computing Lab through a research collaboration between UC Berkeley, MIT, Stanford, and Databricks.

Where it ranks on Freedom251

Best AI Prompt Generators in 2026#16 of 29

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Sources

gepa-ai.github.io/gepa/guides/faq/· checked 4 Oct 2026
gepa-ai.github.io/gepa/· checked 4 Oct 2026
github.com/gepa-ai/gepa· checked 4 Oct 2026
gepa-ai.github.io/gepa/about/· checked 4 Oct 2026