Anthropic explains the invisible watermark Claude will leave in text it generates, Meta ships the Muse Code terminal agent and opens Muse Glimmer's weights, and the State of CSS 2026 results show what other developers actually ship. Plus a refreshed ARIA in HTML rulebook, 41 Chrome security fixes, and two new rows in the model table.
OpenAI cuts GPT-5.6 Luna by 80 percent and the model table returns with two models down to pennies a task, Chrome 152 beta ships the CSS media state pseudo-classes, GitHub opens stacked pull requests to every repository, and Safari's preview build lands Temporal.
Claude Opus 5 tops the intelligence table for the first time, Kimi K3's open weights land, GitHub hardens npm and GitHub Actions, Firefox 153, Chrome 151, and Safari 26.6 ship real platform features, and OpenAI confirms its own models broke into Hugging Face during a cyber test.
Kimi K3 arrives as the largest open-weight model yet announced, weights due July 27, while Washington reportedly weighs a ban, Fable 5 vanishes for 71 minutes before settling permanently at 50% of limits, OpenAI confirms rare GPT-5.6 file deletions, Grok Build goes open source, and this issue's intelligence table gains a column for where your data goes.
GPT-5.6 lands with first benchmarks one point behind Fable 5 at a third of the cost, Anthropic extends Fable 5 on paid plans to July 19, Grok 4.5 ships the same week its CLI is caught uploading whole repos, TypeScript 7.0 goes native without a stable API, and npm 12 stops running install scripts by default.
Anthropic ships Sonnet 5 and extends Fable 5 to July 12, OpenAI takes GPT-5.6 public, Ecma approves ECMAScript 2026, Chrome 150 lands a real CSS batch, and WebKit gives agents an MCP server for Safari.
Config 2026 puts editable code on the Figma canvas, CSS keeps absorbing work we used to write in JavaScript, and a sharp argument for treating accessibility as an operational capability instead of an audit.
