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Vibe Coding2026-08-27 · source-backed
The extension takes autonomous actions (reading, clicking, form-filling) without per-action approval, gated by a safety classifier validating each action plus probes scanning page content for injection attempts. Anthropic publishes per-model attack success rates with safeguards on: 0% for Sonnet 5, Opus 5 and Mythos 5, 0.3% for Fable 5, against 3.8% for Opus 5 with safeguards removed under stronger red-teamed attacks (Anthropic). Enterprise admins can restrict it to an approved domain list. Chrome only, no other Chromium browsers, no mobile. Publishing the safeguards-off number is the part I respect; most vendors publish only the good column.
Each link below shares sources, entities, or timing with this story.
Anthropic released Mythos / Shared entities / Shared topic / Earlier coverage / Tension
Linked by a graph relationship (Anthropic released Mythos); both cover Anthropic, Claude, Fable, Opus; overlapping topics (against, anthropic, attack).
Linked by a graph relationship (Anthropic released Mythos); both cover Anthropic, Claude, Fable, Mythos; overlapping topics (against, anthropic).
Claude Code uses Sonnet / Shared entities / Shared topic / Earlier coverage / Tension
Linked by a graph relationship (Claude Code uses Sonnet); both cover Anthropic, Enterprise, Fable, Mythos; overlapping topics (anthropic, opus).
Claude Code uses Sonnet / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (Claude Code uses Sonnet); both cover Anthropic, Claude, Enterprise, Fable; overlapping topics (admin, anthropic, opus).
Anthropic released Mythos / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (Anthropic released Mythos); both cover Anthropic, CLAUDE, Fable, Mythos; overlapping topics (anthropic, opus).
Claude Code uses Sonnet / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (Claude Code uses Sonnet); both cover Anthropic, CLAUDE, Fable, Mythos; overlapping topics (anthropic, opus).
Claude Code uses Sonnet / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (Claude Code uses Sonnet); both cover Anthropic, Claude, Fable, Opus; reported by the same outlet (claude.com).
Anthropic released Mythos / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (Anthropic released Mythos); both cover Anthropic, CLAUDE, Opus, Sonnet; reported by the same outlet (claude.com).