Reletter

Popular Links Shared by Newsletter Writers

Ten widely shared links a week from 7m+ newsletters on Substack, Beehiiv, Kit, Ghost and LinkedIn, picked to cover a balanced mix of topics.
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September 5–11, 2026

This week newsletter writers shared OpenAI’s GPT-6 Astra announcement more than anything else. They also linked to Anthropic’s Claude Fable and Mythos release and Google’s Gemini Flash announcement. Nvidia’s plan to acquire Hugging Face was widely cited too.

  1. GPT-6 Astra: A new generation of intelligence
    openai.com·206 mentions
  2. Introducing Claude Fable 5.1 and Claude Mythos 5.1
    anthropic.com·97 mentions
  3. Introducing Gemini 3.8 Flash and 3.8 Flash Cyber
    blog.google·69 mentions
  4. NVIDIA to Acquire Hugging Face
    nvidia.com·65 mentions
  5. The Hugging Face incident and the road ahead
    openai.com·60 mentions
  6. Brief independent investigation of agents’ behavior, reasoning and collaboration in the OpenAI / Hugging Face hacking incident
    metr.org·58 mentions
  7. The Rise and Fall of Agent Civilizations
    dwarkesh.com·57 mentions
  8. Discovery of a new OpenAI agent message board
    collusion.wiki·56 mentions
  9. An Alien Mind
    openai.com·55 mentions
  10. Jacob Coxon on X: "I resigned from Anthropic today. I spent the last three years doing pretraining research at both OpenAI and Anthropic. Neither company is acting responsibly. They are racing straight to self-improving superintelligence and gambling with our lives. More thoughts below."
    x.com·45 mentions
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Past Weeks

October 3–9, 2026Sep 26 – Oct 2, 2026September 19–25, 2026September 12–18, 2026September 5–11, 2026Aug 31 – Sep 6, 2026August 24–30, 2026
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How is this list put together?

Every week Reletter extracts the outbound links from the newsletter issues published across 7m+ newsletters. Links are cleaned up so the same page only counts once (tracking parameters are stripped and redirects unwrapped), then ranked by how many distinct newsletters cited them, so a single newsletter repeating a link cannot push it up. From the top of that ranking we pick ten: the week's biggest story first, then widely shared links on other topics, from politics and the economy to science, sport and the arts.

Why not just show the top of the ranking?

A few subjects take up most of the raw ranking. In a typical week most of the top links are about AI, so a straight top ten would show the same subject over and over. Picking across topics shows the breadth of what newsletters were reading. Every link here was still widely shared, and each one shows how many newsletter issues mentioned it.

What links are left out?

Links from a newsletter to its own site, sharing and subscribe buttons, images and other boilerplate are excluded. So are sponsor links that repeat across most issues of the same newsletter, since those are paid placements rather than citations.

When does it update?

A new list is published every Friday evening covering the week from Saturday to that Friday. Once published, each week is frozen and stays available on its own page.

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