GroundBench: leaderboard
Metric: Filled-region IoU (0-100), IoU x 100 (mean over the five vertex budgets N=8, 16, 24, 32 and 64; 1,500 RefCOCO, RefCOCO+ and RefCOCOg image, expression and referent triples (500 each) re-targeted to exact-N polygons; the model returns exactly N integer vertices and the filled polygon is scored by IoU against the canonical target; fixed denominator (an unparseable answer scores 0); first parseable output over one call plus up to two stateless retries). Source: arxiv.org. Saturation forecast: Around April 2027. 4 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Gemini 3.5 Flash (High) | 57.7 |
| 2 | Seed 2.0 Pro | 42.7 |
| 3 | Kimi K2.7 Code | 33.9 |
Interactive version: theaggregate.ai/benchmark?slug=groundbench · How It Works · Data refreshed daily, snapshot 2026-09-26.