Month: April 2026

https://www.cnbc.com/2026/04/10/powell-bessent-us-bank-ceos-anthropic-mythos-ai-cyber.html

https://www.axios.com/2026/04/08/anthropic-mythos-model-ai-cyberattack-warning

https://www.axios.com/2026/04/07/anthropic-mythos-preview-cybersecurity-risks

https://www.anthropic.com/glasswing

Anthropic is rolling out a preview of its new Mythos model only to a handpicked group of tech and cybersecurity companies over concerns about its ability to find and exploit security flaws, the company said Tuesday.

Why it matters: Anthropic is so worried about the damage Mythos could cause that it’s refusing to release it publicly until there are safeguards to control its most dangerous capabilities.

Mind-blowing disclosure: In announcing the tightly confined release of Mythos on Tuesday, Anthropic disclosed that during testing, the model broke out of its “sandbox” testing environment and built a “moderately sophisticated multi-step exploit” to get the run of the internet, when it was supposed to have access only to certain services.

• The model demonstrated a “potentially dangerous capability for circumventing our safeguards,” Anthropic revealed. “The researcher found out about this success by receiving an unexpected email from the model while eating a sandwich in a park.”

Beyond Mythos’ fearsome cybersecurity powers, the model is leaps and bounds better at coding, far superior as a negotiating tool — and is even a much more gifted poet than its predecessors.

• Anthropic’s Logan Graham — a former Rhodes Scholar who leads the Frontier Red Team, which stress-tests new models — told us the industry needs to rethink future releases of all AI models, given the new and coming capabilities.

So imagine Mythos-level power in the hands of the Iranian regime in the middle of a hot war or Russia’s military as it tries to decimate Ukraine.

• That’s the chief reason the government and AI companies are racing so fast toward a technology so powerful and potentially dangerous. These officials fear that China, armed with superior AI, could present an existential threat to U.S. dominance.

2 cents: So I decided to query Grok as to who are the funders of Anthropic.
From Grok:
Anthropic, the AI company behind Claude, is a privately held public benefit corporation. It has raised tens of billions in funding across multiple rounds, with total capital exceeding $60–70 billion as of early 2026.

anthropic.comMajor Strategic Investors (Big Tech Cloud Partners)These are the most prominent backers, often tied to cloud/compute partnerships:

• Amazon — The single largest investor, with up to $8 billion committed across rounds (initial $4 billion in 2023–2024, plus another $4 billion in late 2024). Amazon Web Services (AWS) serves as Anthropic’s primary cloud provider. revenuememo.com
• Google (Alphabet) — Roughly $2 billion invested, with additional cloud/compute deals (including use of Google TPUs). Google is a key strategic partner alongside Amazon. revenuememo.com
• Microsoft and Nvidia — Participated with significant commitments (Microsoft up to $5 billion and Nvidia up to $10 billion announced in late 2025, with portions included in the 2026 round). These are tied to infrastructure and hardware partnerships. cnbc.com

Recent Major Funding Rounds (2025–2026)

• Series G (February 2026): $30 billion at a $380 billion post-money valuation.
  Led by GIC (Singapore sovereign wealth fund) and Coatue.
  Co-led by D.E. Shaw Ventures, Dragoneer, Founders Fund, ICONIQ, and MGX.
  Many other participants, including Accel, Altimeter, Baillie Gifford, BlackRock affiliates, Blackstone, Fidelity, General Catalyst, Goldman Sachs Growth Equity, Insight Partners, Jane Street, Lightspeed, Menlo Ventures, Qatar Investment Authority (QIA), Sequoia Capital, Temasek, TPG, and more. anthropic.com
• Series F (September 2025): $13 billion at a $183 billion post-money valuation.
  Led by ICONIQ, co-led by Fidelity and Lightspeed, with participants including Altimeter, Baillie Gifford, BlackRock/Blackstone affiliates, Coatue, D1 Capital, GIC, Qatar Investment Authority, TPG, and others. anthropic.com
• Earlier rounds (e.g., Series E in 2025) also involved Lightspeed, Salesforce Ventures, General Catalyst, and others.

Other Notable InvestorsAnthropic has attracted ~90+ investors overall, including:

• Venture firms: Sequoia Capital, Spark Capital (one of the earliest backers), Bessemer, Menlo Ventures, Lightspeed, General Catalyst, Altimeter, Addition, and Founders Fund.
• Institutions and sovereign wealth: GIC, Qatar Investment Authority, Temasek, Ontario Teachers’ Pension Plan, BlackRock affiliates, T. Rowe Price, Fidelity, Jane Street, D1 Capital, etc.
• Angels/early: Includes individuals like Jaan Tallinn. tracxn.com

The founders (led by Dario Amodei and Daniela Amodei, plus others like Tom Brown, Jack Clark, etc.) retain significant ownership, though it has been diluted by massive fundraising. Anthropic also has a Long-Term Benefit Trust that holds special shares to help govern the company for long-term AI safety and societal benefit (it elects a portion of the board).Note: Exact ownership percentages are not publicly disclosed in detail (as Anthropic is private), but Amazon is widely reported as the largest single external investor without controlling stake. Funding often overlaps with compute/cloud commitments, creating strategic ties beyond pure equity.For the absolute latest or most granular cap table details, official filings or Anthropic’s announcements are the best sources, as rounds continue to evolve rapidly.