| 1. Claude Opus 5 (High) |
| 2. Claude Opus 5 (Max) |
| 3. Claude Fable 5 (High) |
| 4. GPT 5.6 Sol (xHigh) |
| 5. Claude Opus 4.8 (High) |
The BriefAnthropic told some Claude users that malware on their own computers stole their logged-in sessions, and strangers quietly burned through their paid usage. The stolen browser cookies let thieves skip past two-factor checks, and the same trick works on any AI account you pay for, not just Claude. Take five minutes this week: run a malware scan, sign out of all sessions on your AI accounts, and change those passwords.
Level UpThis week, do a session audit on every AI account you pay for: run a malware scan first, then sign out of all devices and change the password, so a clean login stays clean. SecurityWeek lists the six malware families involved and the cleanup order that works. SecurityWeek: the Claude session-hijack warning and what to do about it