AI BriefingClaude Weekly Update: Personal Finance Beta, METR AI Acceleration Report, and Text Watermark Rollout
·2026.11.10 23:01
Key point
Anthropic launched a read-only Personal Finance beta and introduced invisible text watermarks for specific models, while a METR report suggests AI is accelerating Anthropic's R&D by roughly twice the previous rate.
Details
- Personal Finance launched in beta on Nov 5 for Pro, Max, and Ultra plans in the US, allowing read-only access to bank, card, loan, and investment accounts via Plaid.
- A Nov 5 METR report states Anthropic is likely improving models on well-specified tasks at around twice the rate of March 2024 to October 2025, with about 80% of that improvement attributed to AI.
- Text from Mythos 5, Opus 4.7, and Sonnet 4.6 carries an invisible watermark since Nov 3, detectable only with a secret key and effective against light edits but not full rewrites.
- The Xen Project issued an advisory on Nov 3 stating Anthropic found two serious security holes in Xen using Claude, allowing one VM to read and write other VMs' memory.
- Message threads API beta (Nov 2) reduces time to first token by about 35% for 500k to 1M token requests while maintaining the same price.
- Opus 4.8 fast mode ends Nov 30, after which fast mode calls will return an error.
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