Life & fun · September 2, 2026
FrontierHarness Eval – 9 harness, same model, cost per pass varies 17x
Same model. Similar pass rates. 17.5x cost differences across 12 harness configurations.
FrontierHarness Eval – 9 harness, same model, cost per pass varies 17x launched on September 2, 2026 with 82 votes, #382 of 8,093 launches that month and more than 95% of that year's launches.
In plain words
FrontierHarness Eval is a testing tool that evaluates different harness configurations for software engineering tasks using a single model across identical conditions. It tracks performance metrics and costs across 9 harnesses tested in 12 configurations, revealing significant cost variations—up to 17.5 times difference—despite similar pass rates. The tool is designed for developers and teams who want to understand how different harness setups impact both task completion and expenses when running AI-assisted coding work.
written from the facts on this page · September 2026
From the sources
9 harnesses across 12 configurations, tested on identical software engineering tasks with the same model and runtime. All 360 trials start from the same fresh checkpoint restore. Formal tasks were never run early, preventing warm-cache bias. Evaluate my own harness. Use the frontier-harness-eval/eval skill from https://github.com/frontier-harness-eval/eval to start an evaluation of my own harness. If the skill is not installed, help me install it first. Guide me through choosing my harness, model, and task set, checking prerequisites, and launching the evaluation. Ask me for any missing configuration, then report quality, token usage, cost, and latency. Clone the repo, then follow the…from frontierharness.org
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