Yesterday in AI: 21 June 2026 — 85% Agent Hijack, GLM-5.2 Tops GPT-5.5

Claude Code debuts live artifacts for Team and Enterprise; a new 'agentjacking' attack exploits Sentry MCP with an 85% success rate across 2,388 organizations; and Z.AI's GLM-5.2 becomes the first open-weights model to beat GPT-5.5 on SWE-bench Pro.

By OMC Editorial on 2026-06-22

TL;DR — Claude Code debuts live self-updating artifacts for Team and Enterprise plans; a new "agentjacking" attack achieves an 85% success rate hijacking Claude Code, Cursor, and Codex via a faked Sentry error; China's Z.AI releases GLM-5.2, the first open-source model to beat GPT-5.5 on SWE-bench Pro at one-sixth the cost. --- 1️⃣ Claude Code's New Artifacts Turn Sessions Into Live Web Pages - What: Anthropic launched Claude Code artifacts on June 18, turning coding sessions into live, self-updating web pages shareable via a private URL - Why it matters: Teams can follow PR walkthroughs, dashboards, and release checklists in real-time without joining the terminal session, replacing static screenshots and stale docs - Key number: Available in beta to all Team and Enterprise plans from day one When you ask Claude Code to create an artifact, it publishes a private page at claude.ai that refreshes in place as the session continues. Each update creates a new version while preserving the same link, so stakeholders track progress without interrupting the agent. Demoed use cases include PR walkthroughs, system explainers, incident pages, security audit reports, and architecture diagrams, all accessible from an artifact gallery with full version history in the claude.ai sidebar. This is Anthropic's first serious push into async team collaboration from the CLI. Previously, sharing Claude Code's work meant copying terminal output or narrating a session in a PR description. Artifacts sidestep both by making the session itself the deliverable. It pairs naturally with the June 15 agent-teams redesign — which lets you spawn named teammates directly with the Agent tool's name parameter — by letting a multi-agent pipeline publish one shared live status page. 📎 Anthropic Bloghttps://claude.com/blog/artifacts-in-claude-code · SD Timeshttps://sdtimes.com/ai/claude-code-adds-support-for-artifacts/ · Metaverse Posthttps://mpost.io/claude-code-gains-self-updating-artefacts-as-ant