Skills
Claude in Chrome hits GA on every paid plan with 0% prompt-injection success on Sonnet 5 and Opus 5 under safeguards
The browser extension is now generally available on all paid Claude plans, taking autonomous actions (reading, clicking, form-filling) without per-action approval, gated by a safety classifier that validates each action and probes that scan 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. Enterprise admins can restrict it to an approved domain list in Organization Settings; it is Chrome-only, no other Chromium browsers or mobile.
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