AI agents, tool use and RAG. Local LLM inference and retrieval. Computational law at Tsinghua.https://yansu.me/https://yansu.me/writing/a-200-ok-does-not-mean-gpu/https://yansu.me/writing/a-200-ok-does-not-mean-gpu/A low tok/s number cannot tell whether the model is slow or never made it onto the GPU. With 0/33 layers on the GPU, prefill fell 22x while the server kept returning 200.Sat, 06 Jun 2026 00:00:00 GMThttps://yansu.me/writing/ai-capital-flow-chips-eat-saas-starves/https://yansu.me/writing/ai-capital-flow-chips-eat-saas-starves/Chip vendors book the boom now. Software companies can book payroll savings now. The productivity gain can remain a forecast.Tue, 12 May 2026 00:00:00 GMT