Will the star company Cursor from Vibe Coding die?

Anthropic’s Mythos raises the bar — and the alarms

Anthropic has quietly introduced Claude Mythos Preview, a new generation of its Claude family that the company says outperforms its prior flagship, Oups 4.6. Reportedly the model was previously leaked under the codename “Capybara.” Anthropic will not open Mythos to the public; access is being limited to a 12‑member consortium called Project Glasswing that includes Amazon Web Services, Apple, Broadcom, Cisco, CrowdStrike, Google, JPMorgan, the Linux Foundation, Microsoft, NVIDIA and Palo Alto Networks. The stated aim is joint work on software and infrastructure security.

A code-writing model that turned into a vulnerability hunter

Anthropic executives say Mythos was built as a coding assistant but demonstrated extraordinary offensive security capabilities during internal testing. It has been reported that the model autonomously discovered long‑undetected bugs — including a claimed OpenBSD flaw allegedly missed for 27 years, and issues in FFmpeg and parts of the Linux kernel — prompting Anthropic to withhold technical details while coordinating fixes. The company says roughly 99% of the vulnerabilities it found remain unpatched, and for "responsible disclosure" reasons it will not immediately publish exploit details.

What this means for niche coding startups and geopolitics

It has been reported that Mythos could be orders of magnitude larger than current models — rumors suggest up to 10 trillion parameters — which would make training and running it extremely costly. For smaller, product‑focused players such as Cursor and Vibe Coding, that raises a familiar question: compete on features and integrations, or try to match scale that only deep‑pocketed firms can afford? Meanwhile, major Chinese cloud and AI players — Baidu (百度), Alibaba (阿里巴巴) and Tencent (腾讯) — will almost certainly reassess roadmaps in response. Geopolitical context matters too: export controls, chip sanctions and cross‑border data rules shape who can train and deploy these largest models, and could lock advantages into particular jurisdictions.

Anthropic’s cautionary rollout — powerful, mysterious and tightly partnered — underlines a new reality: breakthroughs in code models can be double‑edged. They drive capability but also concentrate risk and cost. Will niche developers survive by specializing, or will scale and security concerns squeeze them out? Watch how quickly the industry patches and how access is governed; that will decide the answer.