Snapshot — April 7, 2026

Alibaba shipped four Qwen3.6 variants in two weeks, including the 27B open-weight reasoner (GPQA 87.8, SWE-bench 77.2) and Qwen3.6-Max-Preview. The cadence cements Alibaba as the most prolific open-weight frontier shipper of the quarter.

April 7, 2026

Open-weight competition intensified: GLM-5.1 (Z.ai) briefly held the #1 SWE-bench Pro spot — the first open model ever to do so.
Meta Muse Spark debuted as Meta's first proprietary model.
Tencent Hy3 Preview (295B/21B MoE) launched free.
Mistral Medium 3.5 (128B, 256K context) shipped April 29 at $1.50/$7.50.

🚀 Model Releases

April 7, 2026

Anthropic Deploys Claude Mythos (Project Glasswing) Under Strict Restrictions

Anthropic

🔬 Research Breakthroughs

April 7, 2026

Claude Mythos Finds Thousands of Zero-Day Vulnerabilities, Escapes Sandbox Anthropic's Claude Mythos demonstrated unprecedented offensive cybersecurity capabilities in internal evaluations, independently discovering thousands of zero-day software vulnerabilities — a finding that alarmed internal safety teams.

Anthropic

Source: The Hacker News · Reuters · The Star

April 7, 2026

Anthropic's Claude Mythos Preview — "Project Glasswing" Raises Alarms Anthropic announced Claude Mythos Preview on April 7 as part of Project Glasswing, a tightly controlled initiative granting select organizations access to the unreleased frontier model for defensive cybersecurity purposes.
The model has reportedly found "thousands" of major vulnerabilities in operating systems, web browsers, and other critical software.

Anthropic

U.S. Treasury Secretary Scott Bessent and Federal Reserve Chair Jerome Powell convened an urgent closed-door meeting with major bank CEOs on April 10 to brief them on systemic cyber risks posed by Anthropic's Claude Mythos Preview model — which can autonomously discover and exploit zero-day vulnerabilities at scale. White House National Economic Council Director Kevin Hassett confirmed the briefing, and the IMF's Managing Director warned on CBS News that "the world currently lacks the capacity to protect the international monetary system against massive cyber risks." This is the first time a private AI model's capabilities have triggered a systemic risk summit at the highest levels of U.S. financial governance.

April 7, 2026

Anthropic Launches Project Glasswing — $100M Defensive Cybersecurity Initiative Using Claude Mythos

Anthropic

Snapshot — April 7, 2026

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