Anthropic Limits 'Claude Mythos' AI to 40 Firms, Software Stocks Slip 3.1%
Anthropic restricted its 'Claude Mythos' AI model to 40 companies, including Google and Microsoft, after uncovering thousands of vulnerabilities across major OS and browsers. The S&P 500 Software and Services Index fell 3.1% Thursday, extending its 26% year-to-date decline as investors fear AI-driven disruption to SaaS providers.
1. Restriction of 'Claude Mythos' Model
Anthropic announced it will grant access to its new Claude Mythos AI model to around 40 companies, including Google and Microsoft, after the model identified thousands of cybersecurity vulnerabilities across every major operating system and web browser. The decision to curb a broader release reflects concerns that wide availability could expose hidden flaws in existing software infrastructure.
2. Broad Software Share Declines
U.S. software stocks reacted sharply, with the S&P 500 Software and Services Index dropping 3.1% on Thursday and down 26% year to date. High-profile cybersecurity names like Cloudflare, Okta, CrowdStrike and SentinelOne slid 4.7% to 7.7%, while Zscaler plunged 8.6% and enterprise software firms such as Atlassian, Workday, Adobe, Salesforce and Intuit declined between 3.7% and 6.8%, as investors grow wary of AI-driven competitive threats to traditional SaaS offerings.