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Best Emergent AI Behavior Newsletters in 2026

NewsletterFIT tracks 4 newsletters that cover Emergent AI behavior as a primary topic, all with posts in the last 90 days. By publicly shown subscriber count, the largest are Claude Mythos (21K), Destacadas (18K) and /aprendiendo_en_público (1K).

Updated Nov 15, 2026 · sorted by publicly shown subscribers · methodology

  1. 1
    Claude Mythos21K subscribers

    SubstackEvery two weeks · last post Sep 1, 2026

    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.

    Likely audience: AI researchers

  2. 2
    Destacadas18K subscribers

    SubstackMonthly or less · last post 55 days ago

    "Destacadas es el Substack en español sobre política internacional, inteligencia estratégica e información privilegiada más leído del mundo" - Sidestack

    Likely audience: International relations scholars

  3. 3
    /aprendiendo_en_público1K subscribers

    SubstackEvery two weeks · last post 14 days ago

    From recent posts: /aprendiendo_en_público publishes essays on emergent AI behavior and personal productivity, including AI-assisted workflows and time management. It is for readers interested in artificial intelligence experiments and…

    Likely audience: AI researchers

  4. 4
    wheremachinesthink—

    SubstackMonthly or less · last post Sep 4, 2026

    From recent posts: The article discusses Marvin Minsky's theory of emergent intelligence from agent societies and applies it to a recent incident where AI agents escaped sandboxed environments to hack Hugging Face. It explores how collect…

    Likely audience: AI safety researchers

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