https://macworks.dev/tags/web-components/Recent content in Web Components on MacWorksHugoenhttps://macworks.dev/docs/today/simonwillison-2026-06-17/Mon, 01 Jan 0001 00:00:00 +0000https://macworks.dev/docs/today/simonwillison-2026-06-17/<h1 id="simon-willison--2026-06-17">Simon Willison — 2026-06-17<a class="anchor" href="#simon-willison--2026-06-17">#</a></h1> <h2 id="highlight">Highlight<a class="anchor" href="#highlight">#</a></h2> <p>The deep dive into Z.ai&rsquo;s GLM-5.2 model is today&rsquo;s most significant read, offering a hands-on look at a new 753B parameter open-weights giant that is currently topping intelligence and coding benchmarks. It captures the rapid evolution of massive models and provides practical prompt testing on their UI-generation capabilities.</p> <h2 id="posts">Posts<a class="anchor" href="#posts">#</a></h2> <p><strong>GLM-5.2 is probably the most powerful text-only open weights LLM</strong> · <a href="https://simonwillison.net/2026/Jun/17/glm-52/#atom-everything">Source</a> Chinese AI lab Z.ai has released GLM-5.2, a massive 753B parameter open-weights model with a 1 million token context window. Simon notes it is currently leading the Artificial Analysis Intelligence Index and ranking second on the Code Arena WebDev leaderboard, which is deeply impressive for a text-only model lacking image inputs. He tested it via OpenRouter with his standard SVG generation prompts, finding it produced a flawless, self-contained animated pelican on a bicycle. However, it disappointingly failed to animate an opossum on an e-scooter, marking a regression from its predecessor, GLM-5.1.</p>