tandemly.ai
Briefing · MAY 27 2026

May 27, 2026

AI daily briefing

🎯 Top 3 Things to Know

1. Anthropic is closing a $30 billion round at over $900 billion valuation, vaulting past OpenAI as the most valuable private AI company. The round is expected to sign this week, co-led by Sequoia, Dragoneer, Altimeter, and Greenoaks at roughly $2 billion each, with Founders Fund and General Catalyst joining. It is the second $30 billion raise in 14 weeks. Anthropic told investors to expect $10.9 billion in Q2 revenue, more than double the prior quarter. The new mark clears OpenAI's $852 billion March valuation, giving frontier-model buyers a sharper signal that supplier concentration is shifting rather than narrowing. The line to watch in the term sheet is the customer commit disclosure: recent enterprise wins (KPMG 276K seats, PwC 30K seats, SAP, EY-Microsoft) are revenue-bearing through 2027, and that is the math outside investors will scrutinize first. Bloomberg

2. Anthropic disclosed that Claude Mythos has identified over 10,000 critical software vulnerabilities, and pushed Claude Security to public beta for Enterprise customers. Mythos Preview scanned more than 1,000 critical open-source projects, surfaced 23,019 candidate findings, and external triage of the sample landed at a 90.8% true-positive rate. As of May 22, Anthropic has formally disclosed 1,596 vulnerabilities across 281 projects, with 97 patched. One finding in wolfSSL, a cryptography library shipped on billions of devices, would have let an attacker forge bank or email certificates. The customer-facing piece is Claude Security, which patched 2,100 vulnerabilities during a three-week pilot. The bottleneck has shifted from discovery to disclosure throughput. AI can scan faster than maintainers can patch, which puts the 90-day coordinated-disclosure clock under real pressure. Anthropic's CVD dashboard is the place to watch the gap. Anthropic

3. Microsoft made computer-using agents generally available in Copilot Studio, alongside the GA of Microsoft 365 E7 and Agent 365. The agents drive websites and desktop apps through the UI rather than scripted selectors, which removes the brittleness that kept RPA stuck for a decade. The bigger story is Agent 365 at $15 per user per month: a single control plane to observe, govern, and secure agents across Copilot Studio, AWS Bedrock, and Gemini imports, with Defender and Intune controls extending to local Windows agents. This is the first credible enterprise answer to agent sprawl. Anyone shipping their own agent platform now has to defend the build-versus-buy math against a vendor that already owns the identity, endpoint, and tenant boundary. Microsoft Copilot Blog

🚀 Frontier Models & Features

🔬 Research Worth Reading

🏢 Enterprise in the Wild

The Project Glasswing partner roster is itself a who-is-on-board snapshot: AWS, Apple, Broadcom, Cisco, CrowdStrike, Google, JPMorganChase, the Linux Foundation, Microsoft, NVIDIA, and Palo Alto Networks all have Mythos access for internal vulnerability work. The notable absence is any cloud-resident financial-data platform, suggesting the next partnership wave targets the financial-services compliance perimeter. CSO Online

🛠️ Tooling & Ecosystem

⚖️ Policy & Regulation

California Governor Gavin Newsom signed Executive Order N-6-26 on May 21, directing state agencies to study severance, subsidized employment, stock compensation, and cooperative ownership for workers displaced by AI. It is the first US executive action to treat AI displacement as a structural policy problem rather than a re-skilling program. Expect downstream procurement and disclosure requirements within 12 months. California Governor's Office

📌 Watch List