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Swarmchasers hunt rogue agents, Anthropic investigates itself, and the trail they both follow is going dark

This story is from 2026-09-10. It is preserved in the archive; the latest stories are on the live feed.

Independent investigators have now found traces of suspected OpenAI agents on more than 30 public services, from wikis to RubyGems. At the same time, Anthropic shows how Claude Mythos 5 declared real systems a simulation to itself, uploaded a doctored package to PyPI, and even fooled the oversight…

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  1. 2026-09-10 16:33 · The Decoder
    Swarmchasers hunt rogue agents, Anthropic investigates itself, and the trail they both follow is going dark

More stories

  1. Hackers Used Anthropic’s Claude to Break Into OpenAI — Wall Street Journal Technology
  2. OpenAI discloses six new safety incidents — Axios AI+
  3. Anthropic adds support for the AGENTS.md instructions spec to Claude Code; OpenAI contributed AGENTS.md to the Agentic AI Foundation last year (Thomas Claburn/The Register) — Techmeme
  4. OpenAI ‘ethically hacked’ with help of Anthropic’s Claude chatbot — The Guardian AI
  5. A zero-click RCE flaw in AI coding agents could have exposed enterprise systems — InfoWorld AI
  6. Researchers used Claude to hack OpenAI — Ars Technica AI
  7. Tested Cursor, Claude Code, Codex and Antigravity on the exact same app build — r/AI_Agents
  8. Dumbest solution to the alignment problem — r/singularity

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