The 96.3% Is a Trap: What Hermes 4 405B Actually Changed

Hermes 4 405B hit 96.3% on MATH-500 when it launched on August 26, 2025. That number got copy-pasted into every coverage headline within 24 hours. Most of those headlines missed the actual story. I've been running Hermes 4 on OpenRouter at $1/M input...