# Optimizer benchmarks

We regularly evaluate every optimizer against shared datasets so you can make informed trade-offs. This page summarizes the latest results and explains how to reproduce them with the public benchmark scripts.

## Datasets & metrics

Each run uses Opik datasets backed by open-source corpuses commonly used in academia:

| Dataset                                                                                                       | Description                             | Primary metrics                        |
| ------------------------------------------------------------------------------------------------------------- | --------------------------------------- | -------------------------------------- |
| Arc ([ai2\_arc](https://huggingface.co/datasets/allenai/ai2_arc))                                             | Multiple-choice science questions.      | LevenshteinRatio, accuracy.            |
| GSM8K ([gsm8k](https://huggingface.co/datasets/openai/gsm8k))                                                 | Grade-school math word problems.        | Exact match, custom math verifier.     |
| MedHallu ([medhallu](https://huggingface.co/datasets/UTAustin-AIHealth/MedHallu))                             | Medical Q\&A with hallucination checks. | Hallucination, AnswerRelevance.        |
| RagBench ([ragbench](https://huggingface.co/datasets/wandb/ragbench-sentence-relevance-balanced/discussions)) | Retrieval-oriented questions.           | AnswerRelevance, contextual grounding. |

Results shown below use `openai/gpt-5-nano` for evaluation on non multi-hop based runs. Scores will change if you select different models, metrics, agent configurations or prompt seeds.

## Latest results

| Rank | Algorithm/Optimizer        | Avg. Score | Arc        | GSM8K      | RagBench   |
| ---- | -------------------------- | ---------- | ---------- | ---------- | ---------- |
| 1    | HRPO                       | **67.83%** | **92.70%** | 28.00%     | 82.80%     |
| 2    | Few-Shot Bayesian          | 59.17%     | 28.09%     | **59.26%** | 90.15%     |
| 3    | Evolutionary               | 52.51%     | 40.00%     | 25.53%     | **92.00%** |
| 4    | MetaPrompt                 | 38.75%     | 25.00%     | 26.93%     | 64.31%     |
| 5    | GEPA                       | 32.27%     | 6.55%      | 26.08%     | 64.17%     |
| 6    | Baseline (no optimization) | 11.85%     | 1.69%      | 24.06%     | 9.81%      |

:::callout{intent="info"}
These are directional numbers. Some optimizers use more LLM/tool calls per trial than others (e.g., the HRPO Hierarchical Reflective Prompt Optimizer batches multiple analyses), so cost and runtime are not apples-to-apples even when the trial budget matches. Re-run the suite with your own datasets, models, and cost constraints before committing to a single optimizer.
:::

## Run benchmarks locally

1. Install dependencies (ideally in a virtualenv):
   ```bash
   pip install -r sdks/opik_optimizer/benchmarks/requirements.txt
   ```
2. Configure provider keys (e.g., `OPENAI_API_KEY`).
3. Execute the runner:
   ```bash
   python sdks/opik_optimizer/benchmarks/run_benchmark.py \
     --model openai/gpt-5-nano \
     --output results.json
   ```
4. Inspect the JSON or load it into a notebook to compare against the published table.

The script spins up datasets defined in `sdks/opik_optimizer/benchmarks/config.py`, runs each optimizer with consistent trial budgets, and logs runs to Opik so you can review traces. Note that production use should include separate validation datasets to prevent overfitting—see [Define datasets](https://www.comet.com/development/optimization-runs/optimization/define_datasets) for guidance.

:::callout{intent="tip"}
Looking for production-style examples beyond synthetic benchmarks? Check out the [agent optimizations demos](https://github.com/comet-ml/agent-optimizations-demos) repo. It contains end-to-end scenarios (LangGraph, RAG, support bots) and shows how different optimizers behave in real workloads.
:::

## Next steps

- Learn how each optimizer works in the [Algorithms overview](https://www.comet.com/development/optimization-runs/algorithms/overview).
- Customize the benchmark configs (datasets, metrics, budgets) to mirror your production workload.
- Share results or contribute improvements via [GitHub](https://github.com/comet-ml/opik/tree/main/sdks/opik_optimizer/benchmarks).

## Related pages

- [Optimization algorithms overview](./development-optimization-runs-algorithms-overview.md)
- [MetaPrompt Optimizer](./development-optimization-runs-algorithms-metaprompt-optimizer.md)
- [HRPO (Hierarchical Reflective Prompt Optimizer)](./development-optimization-runs-algorithms-hierarchical-adaptive-optimizer.md)
- [Few-Shot Bayesian Optimizer](./development-optimization-runs-algorithms-fewshot-bayesian-optimizer.md)
- [Evolutionary Optimizer: Genetic Algorithms](./development-optimization-runs-algorithms-evolutionary-optimizer.md)
- [GEPA Optimizer](./development-optimization-runs-algorithms-gepa-optimizer.md)
- [Parameter Optimizer: Bayesian Parameter Tuning](./development-optimization-runs-algorithms-parameter-optimizer.md)
- [Tool Optimization (MCP & Function Calling)](./development-optimization-runs-algorithms-tool-optimization.md)

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