The Mysterious Hy3 LLM Tops OpenRouter Rankings by a Large Margin — 98% Input, 2% Output Signals Hidden Bulk Application

Max Woolf / Hacker News·medium signal

Tencent's Hy3 preview model unexpectedly tops OpenRouter's rankings, beating Claude by over 50% in token usage, despite benchmarks showing it underperforms other Chinese open-source models. Max Woolf's investigation reveals suspicious patterns: 98% input vs 2% output tokens, only one provider (SiliconFlow), virtually no app-based traffic, and usage persisting after switching from free to paid. Evidence points to a single large undisclosed application driving most volume. 85 points, 73 comments on HN.