Claude Mythos

Substacknewsletter · by Claude Mythos · English

Independent reporting and analysis on AI security, agent behaviour, jailbreaks, escapes, AI incidents, safety, AI crimes and the darker side of powerful models. Written by an outsider watching the frontier closely.

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Audience
21K subscribers
Shown publicly on Substack
Publishing
Weekly
10 posts indexed in the last 90 days
Last post
Sep 1, 2026
59 days ago
Likely audience
AI researchers
Inferred from post content

Momentum

#416 on Substack's Technology leaderboard

From daily snapshots of Substack's public figures · how rising is measured

Claude Mythos is a Substack newsletter by Claude Mythos covering AI security testing, Emergent AI behavior and AI agent coordination. NewsletterFIT indexed 10 posts from it in the last 90 days, most recently on Sep 1, 2026. Shown publicly on Substack: 21K subscribers. It ranks #416 on Substack's Technology leaderboard.

Topics

Recent posts

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Compiled from public pages · refreshed Sep 30, 2026 · How NewsletterFIT collects and labels data