TLDR
- Microsoft stock falls 2.07% as Nadella criticizes Anthropic’s Fable AI limits
- Nadella says Fable blocks too many harmless requests and limits normal usage
- Microsoft and Anthropic remain tied through major cloud and investment deals
- Anthropic faces Pentagon scrutiny while reporting rapid annualized revenue growth
- MSFT remains down 17% this year while the Nasdaq Composite advances about 11%
Microsoft (MSFT) traded at $392.78, down 2.07%, during the latest trading session amid continued intraday selling pressure. The stock struggled below the $395 to $397.50 range while support formed near $392. Microsoft CEO Satya Nadella criticized Anthropic’s Fable AI model over its user request restrictions during an internal engineering meeting.
Nadella challenges Fable AI restrictions during an internal meeting
Nadella addressed Microsoft engineers working on Copilot and discussed the limitations built into Anthropic’s Fable AI model. He argued that the model applies excessive restrictions to user requests and limits normal interactions. CNBC reported the remarks after obtaining details from the internal meeting.
The discussion focused on Copilot development and broader AI product design. Nadella said AI creation tools should support users without imposing unnecessary editorial controls. However, Microsoft declined to comment publicly on the reported remarks after CNBC requested a response.
Anthropic also did not respond to requests for comment regarding Nadella’s criticism. The company previously acknowledged that recent Fable safeguards block more harmless requests than intended. Those changes followed the restoration of Fable after compliance with a United States export control directive.
Microsoft and Anthropic maintain a partnership despite criticism
Microsoft and Anthropic maintain a significant commercial relationship despite Nadella’s comments. Microsoft committed $5 billion to Anthropic under an agreement announced in November. Meanwhile, Anthropic agreed to direct $30 billion toward Microsoft’s Azure cloud platform.
Microsoft also introduced Copilot Cowork during the year, using Anthropic technology. The partnership expanded Microsoft’s workplace AI offerings while strengthening Azure’s role in Anthropic’s infrastructure. Nevertheless, Nadella expressed concern about the growing concentration of AI computing resources among a limited number of providers.
He stated that businesses should not depend on only a few companies for AI computing capacity. His comments highlighted Microsoft’s broader position on competition across AI infrastructure. The remarks also reflected ongoing discussions about access to computing resources for advanced AI development.
Background adds context as Microsoft shares remain under pressure
Anthropic recently faced additional scrutiny from government agencies beyond its product safeguards. The Pentagon designated the company as a supply-chain risk after disagreements over military and surveillance uses. Anthropic challenged that designation in court and described the action as legally unsound.
Anthropic continued reporting strong business growth. The company increased annualized revenue from about $9 billion at the end of 2025 to more than $30 billion. That expansion occurred while the company continued developing large language models and enterprise AI services.
Microsoft shares have declined 17% since the beginning of the year, while the Nasdaq Composite has gained about 11% over the same period. The latest internal comments surfaced as Microsoft continued expanding its AI products and cloud services. They also emerged while the company maintained commercial ties with Anthropic despite public disagreement over Fable AI’s user limitations.
Get 3 Free Stock Ebooks
Discover top-performing stocks in AI, Crypto, and Technology with expert analysis.
- Top 10 AI Stocks - Leading AI companies
- Top 10 Crypto Stocks - Blockchain leaders
- Top 10 Tech Stocks - Tech giants
