The Epoch Brief - June 12, 2026

Increased cyber vulnerability reports, Mythos' cyber hype, Fable 5's lead on FrontierMath v2, record-setting data centers, and what wealth distribution could look like after AGI

This week at Epoch:

• The launch of our new Cyber Vulnerabilities explorer, a tool for better understanding how AI capabilities are changing cybersecurity.

• Two new Data Insights: the record for compute at a single data center has doubled every seven months, and AI infrastructure’s rising contribution to US GDP.

• Version 2 of FrontierMath: Tiers 1–4 is now available, and it shows a significant increase in AI math capabilities. Anthropic’s Fable 5 currently tops the leaderboards.

• Two new Gradient Updates: examining whether Mythos’ cyber capabilities live up to the hype, and proposing a framework for thinking about wealth distribution after AGI.

Research

Introducing the Cyber Vulnerabilities explorer

As AI capabilities change what's possible for both cyber attackers and defenders, the Cyber Vulnerabilities explorer helps quantify that impact. The explorer tracks vulnerabilities reported to the CVE Program by all participating organizations since 2022. You can explore the full dataset, or filter for the 21 most notable vendors and open-source projects (e.g., Microsoft, Google, Apple, and Linux). Reports can be broken down by severity level and overlaid with key AI milestones.

That overlay reveals a dramatic uptick in High and Critical CVEs around the time Anthropic released Mythos Preview to Project Glasswing partners in late March. (For more on Mythos’ cybersecurity impact, see the Gradient Update from this week.)

Data Insights

The record for computing capacity in a single data center has doubled every 7 months

• Since the launch of SpaceXAI’s Colossus 1 in August 2024, the record for the largest AI data center by computing capacity has doubled every seven months. Facilities like Anthropic-Amazon New Carlisle, Microsoft Fairwater Atlanta, and Meta Prometheus have each claimed the top spot at different times. Increased single-site capacity facilitates the training of more capable AI models.

The AI boom has doubled computing infrastructure’s share of US GDP

• The AI infrastructure boom, which began in 2023, has more than doubled the share of US GDP attributable to computing infrastructure. Investment in AI-related data center construction, compute hardware, and networking equipment accounted for ~0.8% of US GDP in Q1 2026, driving computing infrastructure as a whole to ~1.5% of GDP, up from a 2015–2022 average of ~0.7%. AI infrastructure is now the leading driver of growth in private investment in the US.

The new FrontierMath: Tiers 1–4

We launched Version 2 of FrontierMath: Tiers 1–4 today, following an audit that addressed small but critical errors in 42% of problems in the original benchmark. Model rankings on v2 are similar, but scores are higher across the board.

Claude Fable 5, Anthropic's newest and most capable model, now holds the top spot, reaching 87% on Tiers 1–3 and 88% on Tier 4. This continues a streak of rapid improvement in Anthropic models’ math capabilities. (Note that Fable 5 is the publicly available version of the Mythos model, whose much-discussed cyber capabilities we analyze elsewhere in this newsletter.)

Commentary

We published two new Gradient Updates, where Epoch researchers and guests share more opinionated or informal takes on big questions in AI progress. Gradient Updates represent the views of the authors, and do not necessarily reflect the views of Epoch AI as a whole.

Controlling the capital after AGI

• Epoch’s Head of Economics, Phil Trammell, and researcher Anson Ho explore the leading proposals for universal redistribution after AGI, finding that they differ along a primary axis: how much direct control over capital they propose to give citizens.

Are Mythos’ cyber capabilities overhyped?

• Timothée Chauvin joins Epoch researchers to compile the public evidence around Mythos capabilities, finding that while it’s unclear if Mythos is ahead of trend in discovering vulnerabilities, it represents a big jump in exploiting them.

Other Updates

Careers

We’re hiring across several roles. All positions are fully remote.

• Designer to translate complex research into intuitive, engaging, and high-impact designs — primarily UI/UX and data visualization work.

• Researchers and Senior Researchers to lead new projects across our expanding teams.

• Data Scientist (Contract) to assist with our AI research efforts, including reviewing technical literature, tracking benchmark data, and analyzing AI models, data centers, and companies.

Applications are rolling, so apply soon!