- Who it helps
- Developers choosing an execution setup for an open model.
- Availability
- Public Hugging Face Space and method interface, labelled v0.1.1; no paid run was started.
What it offers
Its interface describes holding the model, provider and reasoning effort fixed, running three attempts, exposing trajectories and displaying uncertainty. Dynamic score rows were unavailable in the retrieved page.
Why the controls matter
Changing agent software can change tool use and retries even when the underlying model stays fixed. The stated comparison controls are useful for investigating that difference; conclusions still depend on which tasks and failures the board exposes.
What you can do
- Compare repeated failures and task-level traces for the same model and provider before choosing agent software. Open reference ↗
Where the evidence stops
No winner, cost saving or reproducibility claim was verified. Inspect task-level traces and repeated failures before applying the results to another workload.
Sources read. Public source text read November 7, 2026 UTC. No model inference, installation or complete workflow executed.
Sources & further reading
Hugging Face · demonstration
Harness Leaderboard Space ↗
Public Space linked its running comparison interface.
Joel Niklaus · page checked 2026-11-07
Web · demonstration
Harness Leaderboard method ↗
Interface describes matched models, three attempts and public trajectories; dynamic result rows were not retrieved.
Joel Niklaus · page checked 2026-11-07
Coverage note: Independent cross-platform discussion and end-to-end execution remain unverified.
The record over time (1)
Dated source checks and published explanations. An observation date can differ from the original release date.
- · Added to Current
Harness Leaderboard is a public comparison interface intended to isolate how agent software changes a model’s results.