xAI has announced the release of Grok 4.20 Beta 2, featuring significant improvements in instruction following and hallucination suppression. The update also enhances scientific text quality with better LaTeX rendering, increases precision in image search triggering, and boosts reliability in multi-image rendering. Grok 4.20, which began public testing in late February, is part of xAI's "fast learning" architecture, with weekly updates and feedback encouraged by Elon Musk.