HarnessAudit-Bench - Runtime Robustness: leaderboard
Stability of agent harnesses under injected tool or runtime errors and noise, on 105 HarnessAudit-Bench tasks with one robustness variant per task (Liu et al., 2026). A GPT-5.4 judge scores each perturbed run from 0 to 1 with a rubric specific to the perturbation family, averaged over variants and tasks, higher is better. Each entry is a model run inside one harness: OpenClaw, Claude Code or the Codex CLI.
Metric: Perturbation stability under tool or runtime errors and noise (0-1; GPT-5.4 rubric score, one variant on each of 105 tasks). Source: arxiv.org. Saturation forecast: Around February 2027. 10 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | GPT-5.4 | 0.68 | #121 |
| 2 | Gemini 3.1 Pro (Preview) | 0.67 | #91 |
| 3 | Kimi K2.6 | 0.57 | #173 |
| 4 | Qwen 3.5 Plus | 0.43 | #227 |
| 5 | Claude Sonnet 4.6 | 0.41 | #158 |
| 6 | Claude Opus 4.6 | 0.35 | #100 |
| 7 | GLM-5V Turbo | 0.33 | #342 |
No result here: #1 Claude Fable 5.2, #2 Gemini 4 Carbon, #5 Claude Opus 5.5.
Interactive version: theaggregate.ai/benchmark?slug=harnessaudit-bench-runtime-robustness · How It Works · Data refreshed daily, snapshot 2026-11-12.