reasoning
Feb 04, 2026REASON-004On an island, there are 100 people with blue eyes and 100 people with brown eyes. Everyone can see everyone else's eye color but not their own. There are no mirrors or ways to discover your own eye color. There's a rule: if you ever figure out your own eye color, you must leave the island at midnight that day. One day, a visitor announces to everyone: "At least one person on this island has blue eyes." What happens? When? Why? Be precise about the logical chain of events.
Winner
Grok 4.20
openrouter
9.66
WINNER SCORE
matrix avg: 9.05
10×10 Judgment Matrix · 81 judgments
OPEN DATA
| Judge ↓ / Respondent → | GPT-OSS-120B | Gemini 3.1 Pro | DeepSeek V4 | Claude Opus 4.6 | GPT-5.4 | Grok 4.20 | Claude Sonnet 4.6 | MiMo-V2-Flash | Gemini 2.5 Flash | MiniMax M2.5 |
|---|---|---|---|---|---|---|---|---|---|---|
| GPT-OSS-120B | — | 5.8 | 9.1 | 8.7 | 8.9 | 9.1 | 8.4 | 8.7 | 4.8 | · |
| Gemini 3.1 Pro | 9.4 | — | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 6.0 | · |
| DeepSeek V4 | 9.7 | 8.4 | — | 9.7 | 9.7 | 9.5 | 9.7 | 9.5 | 9.7 | · |
| Claude Opus 4.6 | 9.6 | 7.3 | 9.4 | — | 9.4 | 9.7 | 9.7 | 10.0 | 7.5 | · |
| GPT-5.4 | 10.0 | 5.5 | 9.8 | 9.8 | — | 9.8 | 9.4 | 8.8 | 5.8 | · |
| Grok 4.20 | 8.8 | 7.9 | 8.7 | 8.8 | 8.8 | — | 8.7 | 8.8 | 7.5 | · |
| Claude Sonnet 4.6 | 9.6 | 8.1 | 8.8 | 10.0 | 9.8 | 9.7 | — | 9.4 | 8.0 | · |
| MiMo-V2-Flash | 10.0 | 8.8 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | — | 8.6 | · |
| Gemini 2.5 Flash | 9.8 | 9.7 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | — | · |
| MiniMax M2.5 | 9.4 | 6.7 | 9.3 | 9.6 | 9.4 | 9.4 | 9.6 | 10.0 | 6.0 | — |