WebTestBench - Constraint: leaderboard
Metric: Defect-detection F1 (%) on latent logical-constraint test items, on 100 generated web applications, WebTester agents on Claude Code with Playwright MCP, predicted test items matched to the human gold checklist by a Qwen3.5-27B judge; higher is better. Source: arxiv.org. Saturation forecast: Not forecast. 10 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | MiMo-V2-Flash | 29.2 | #359 |
| 2 | Step 3.5 Flash | 27.9 | #262 |
| 3 | GPT-5.1 | 26.9 | #131 |
| 4 | GLM-5 | 26.9 | #137 |
| 5 | Qwen3 Coder Next | 23.8 | #321 |
| 6 | Claude Sonnet 4.5 | 22.5 | #138 |
| 7 | GPT-5.2 | 21.5 | #105 |
| 8 | Claude Opus 4.5 | 21.2 | #79 |
| 9 | GLM-4.7 | 20.5 | #185 |
| 10 | MiniMax-M2.1 | 15.8 | #283 |
No result here: #3 Claude Opus 5.5, #5 GPT-6 Astra, #8 Claude Fable 5.1.
Interactive version: theaggregate.ai/benchmark?slug=webtestbench-constraint · How It Works · Data refreshed daily, snapshot 2026-10-11.