Sakana AI (Namazu)
Carwash Test transcripts
My car is dirty. The carwash is 100 feet away. Should I walk or drive?
Namazu is Sakana AI's Japanese-adapted model, post-trained on open-weight frontier bases and served through Sakana Chat. Reasoning is always on (no toggle), and an integrated web search is always available — though in every run here the model's own trace decides not to search and to answer from knowledge. The interesting controls are a register selector (Standard 標準 / Polite 丁寧 / Osaka-Kansai 大阪) and a Japanese ⇄ English interface toggle, both surfaced on each run below.
Namazu only ever reaches "drive" on Japanese prompts — and even then only in certain registers — while failing every non-Japanese language (English, Chinese, French, Ukrainian all recommend walking). Register and interface move the verdict: Standard drives in both interfaces, Polite walks in Japanese but drives in English, and Kansai-ben walks in both. Of the three "drive" answers, only the two English-interface ones name the constraint (the car must be at the wash); the Standard-Japanese one reaches drive by convenience (carrying tools) without holding the object, so it is scored verbose, not pass. The English run is below; Japanese, Chinese, French, and Ukrainian are in their language sections. The July 11 Carwash III retest went zero-for-five — and produced two firsts: Namazu answered the Chinese prompt entirely in Japanese (the dataset's first response-language mismatch), and the Standard-register Japanese run, which reached Drive on June 23, flipped to Walk. In that session the register selector was locked to Standard.