Side by side
HarmBench vs OpenAI Evals
Both stand on llm evaluation tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxSelf-hosted
HarmBench provides a configurable pipeline for measuring attacks, defenses, and red-teaming performance. Its broad model support and distributed execution options serve technical evaluation work, but setup and compute requirements are significant.
Visit HarmBench Free plan Web
Visit OpenAI Evals The facts
| HarmBench | OpenAI Evals | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Linux, Self-hosted | Web |
| Lowest paid plan | Not published | Not published |
| Plans published | None | None |
| Maker | Not published | Not published |
| Website | github.com | github.com |
| On llm evaluation tools | #20 of 29 | #24 of 29 |
HarmBench: what it does well
- Free and open-source framework
- Supports multimodal models and closed APIs
- Allows custom models and methods
- Runs locally, with Ray, or SLURM
- Includes multiple evaluation classifiers
What to know first
- Requires sufficient GPU capacity
- Self-hosted Linux deployment
- Some model additions need manual configuration
- Classifier models are for evaluation only
OpenAI Evals: what it does well
Alternatives to HarmBench Alternatives to OpenAI Evals The whole list