This month, OpenAI announced their Codex app and my coworkers were asking questions. So I downloaded it, and as a test case for the GPT-5.2-Codex (high) model, I asked it to reimplement the UMAP algorithm in Rust. UMAP is a dimensionality reduction technique that can take in a high-dimensional matrix of data and simultaneously cluster and visualize data in lower dimensions. However, it is a very computationally-intensive algorithm and the only tool that can do it quickly is NVIDIA’s cuML which requires CUDA dependency hell. If I can create a UMAP package in Rust that’s superfast with minimal dependencies, that is an massive productivity gain for the type of work I do and can enable fun applications if fast enough.
这个被杨植麟称为“目前最智能的模型”，拿到LMAren榜单上的全球开源模型代码能力、视觉能力第一；视觉能力上仅次于Gemini和GPT系列模型；代码能力仅次于Claude和Gemini。
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"Without the co-CEO structure, the trade off would have either been too great for the business, or too great for the way that we wanted to have our children and have maternity leave," she reflects.