模型指纹识别：Space Bunny（M3.1 Flash 匿名版）提前 26 天被认出
用 50 条怪字符串的 token 计费做模型指纹，覆盖 353 个模型、72 种指纹；作者称 Space Bunny 在 MiniMax 确认前 26 天就匹配到 MiniMax。
We built a new way to fingerprint AI models. We throw the same 50 strange strings at every model: Hebrew, Arabic, Thai, maths symbols, emoji families, runs of blank space, code. Then we read the token charge on each bill. One family emoji 👨👩👧👦 costs 1 token on Grok 4.7 and 14 on Claude Sonnet 5.5. Those 50 counts are the model's fingerprint: 353 models we've measured, with 72 distinct fingerprints. The fingerprint also identifies models released under code names. Ox Alpha matched GLM 6 days before Zhipu confirmed it; Union Alpha matched Pareto 18 hours before its team did; Space Bunny matched MiniMax 26 days before MiniMax did. Each model has a record with its fingerprint, the settings its API accepts, its closest relatives and its history. Compare any two side by side, or paste a prompt and see what it costs on 308 models. All free on the website: https://yfarmx.com/ai/llms/model-fingerprints/