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AIAnthropic is not releasing Mythos Preview to general availability. Instead, it is giving defenders early, controlled access so they can find and patch vulnerabilities before Mythos-class models spread across the ecosystem.

AIDario Amodei says the company has tracked growing cyber capabilities in AI models for years, which arise from their general coding proficiency. He states that the new model, Mythos Preview, represents a particularly large step up in those capabilities.

Why it matters: The post links rising cyber capability to general coding skill, and names a notable jump in a new model, Mythos Preview.

AIDario Amodei said many of the world's leading companies have joined Project Glasswing, an effort to address cyber threats posed by increasingly capable AI systems. The initiative was introduced by Anthropic and is powered by its newest frontier model, Claude Mythos Preview, which the quoted post says can find software vulnerabilities better than all but the most skilled humans.

Why it matters: The post gives a concrete example of how a frontier AI lab is organizing industry partners around AI-driven software vulnerability discovery.

AIMckay Wrigley reposted a statement from @SecWar accusing Anthropic of refusing the Department of War unrestricted access to its models for lawful purposes. The quoted statement directs the Department of War to designate Anthropic a Supply-Chain Risk to National Security, bars contractors from commercial activity with Anthropic, and allows Anthropic services for no more than six months. The author's own added text says only that he finds the situation horrifying and supports Anthropic.

Why it matters: The quoted statement is a direct government action against a named AI lab, giving readers a primary-source view of a dispute over military access to AI models.

AIARC Prize reports that the top Kaggle entry reached 24% on the ARC-AGI-2 private dataset at $0.20 per task, and that all winning solutions and papers are open source. The top verified commercial model, Opus 4.5 (Thinking, 64k), scored 37.6% at $2.20 per task, while a Poetiq refinement on Gemini 3 Pro reached 54% at $30 per task. The author argues that refinement loops are the main driver of 2025 progress, and says ARC-AGI-3 is planned for early 2026.

Why it matters: The post links 2025 competition results to a broader argument about refinement loops, showing how benchmark outcomes are being read as evidence of AI reasoning progress.

AICognition has signed a definitive agreement to acquire Windsurf, including its IP, product, trademark, brand, and team. The deal includes Windsurf's IDE, now with full access to the latest Claude models, and $82M of ARR with enterprise ARR doubling quarter-over-quarter. Cognition says it will invest heavily in integrating Windsurf's capabilities into its products while Windsurf continues operating as before.

Why it matters: The post shows how an acquisition of an AI coding IDE was structured around staff treatment and product integration, with specific ARR and customer figures.