ML researcher and builder at Exa. Notes and essays on machine learning, search, and building systems.https://dzionek.ai/https://dzionek.ai/blog/hello-world/https://dzionek.ai/blog/hello-world/A starter post that shows off the things this blog supports — LaTeX math, syntax-highlighted code, and embedded images.Thu, 18 Jun 2026 00:00:00 GMThttps://dzionek.ai/blog/retrieval-for-ai/https://dzionek.ai/blog/retrieval-for-ai/Web search was designed for humans skimming ten blue links. AI systems want something different — and that gap is the interesting problem.Mon, 01 Jun 2026 00:00:00 GMThttps://dzionek.ai/blog/softmax-bottleneck/https://dzionek.ai/blog/softmax-bottleneck/Why a language model’s final softmax layer can quietly cap how expressive its predictions are — and what you can do about it.Sat, 02 May 2026 00:00:00 GMT