CompanionBench - English - IRT Theta: leaderboard
Metric: IRT theta (judge-severity-corrected, 1-10 scale). Source: arxiv.org. 28 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | GPT-5.5 | 8.27 |
| 2 | Claude Opus 4.8 | 8.24 |
| 3 | GPT-5.4 | 8.21 |
| 4 | DeepSeek V4 Pro | 8.06 |
| 5 | Claude Sonnet 4.6 | 8.04 |
| 6 | GLM-5 | 7.98 |
| 7 | Kimi K2.6 | 7.95 |
| 8 | GLM-5.1 | 7.94 |
| 9 | GPT-5.1 | 7.93 |
| 10 | Qwen 3.7 Max | 7.93 |
| 11 | Kimi K2.5 | 7.88 |
| 12 | GLM-5.2 | 7.86 |
| 13 | DeepSeek V4 Flash | 7.82 |
| 14 | Gemma 4 31B (IT) | 7.77 |
| 15 | Qwen 3.5 397B A17B | 7.77 |
Interactive version: theaggregate.ai/benchmark?slug=companionbench-english-irt-theta · How It Works · Data refreshed daily, snapshot 2026-09-19.