Hacker News – 21 May 2026

Table of Contents AI Breakthroughs and Innovations An OpenAI model has disproved a central conjecture in discrete geometry OpenAI Is Preparing to File for an IPO Soon Anthropic is expanding to Colossus2. Will use GB200 Security Concerns in Tech GitHub confirms breach of 3,800 repos via malicious VSCode extension All the bugs they found Exciting New Tools and Features Show HN: Rmux – A programmable terminal multiplexer with a Playwright-style SDK Vivaldi 8.0 Phosphene: I reverse engineered Apple's video wallpapers Programming and Development Updates New features in GCC 16: Improved error messages and SARIF output Simulating Infinity in Conway's Game of Life with Modern C++ How fast is N tokens per second really?