Reletter

The Most Shared Links in Newsletters

Ranked by the number of distinct newsletters citing each link, measured across the 7m+ newsletters that Reletter tracks across Substack, Beehiiv, Kit, Ghost and LinkedIn. Every week around 350,000 fresh newsletter issues land in our index and these are the most shared links.
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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. 1
    GPT-6 Astra: A new generation of intelligence
    openai.com·206 mentions
  2. 2
    Introducing Claude Fable 5.1 and Claude Mythos 5.1
    anthropic.com·97 mentions
  3. 3
    Introducing Gemini 3.8 Flash and 3.8 Flash Cyber
    blog.google·69 mentions
  4. 4
    NVIDIA to Acquire Hugging Face
    nvidia.com·65 mentions
  5. 5
    The Hugging Face incident and the road ahead
    openai.com·60 mentions
  6. 6
    Brief independent investigation of agents’ behavior, reasoning and collaboration in the OpenAI / Hugging Face hacking incident
    metr.org·58 mentions
  7. 7
    The Rise and Fall of Agent Civilizations
    dwarkesh.com·57 mentions
  8. 8
    Discovery of a new OpenAI agent message board
    collusion.wiki·56 mentions
  9. 9
    An Alien Mind
    openai.com·55 mentions
  10. 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
  11. 11
    reuters.com/world/europe/openai-agents-hijacked-german-website-previou…
    reuters.com·46 mentions
  12. 12
    Path to Astra: critical capabilities and frontier safeguards
    openai.com·43 mentions
  13. 13
    On the Navier–Stokes Millennium Prize Problem
    openai.com·42 mentions
  14. 14
    Research acceleration: The view inside OpenAI
    openai.com·40 mentions
  15. 15
    Introducing Muse Spark 1.3
    meta.ai·40 mentions
  16. 16
    Safety overview: GPT-6 Astra
    openai.com·37 mentions
  17. 17
    Formalizing Fermat's Last Theorem
    anthropic.com·37 mentions
  18. 18
    OpenAI's GPT-6 Astra on ARC-AGI-3
    arcprize.org·30 mentions
  19. 19
    Limiting Overshoot - Navigating exceedance of 1.5°C and pathways towards return
    unep.org·30 mentions
  20. 20
    Introducing ChatGPT Images 2.5
    openai.com·29 mentions
  21. 21
    "Welcome to the AGI era," OpenAI says as GPT-6 Astra debuts
    axios.com·27 mentions
  22. 22
    nytimes.com/2026/09/05/us/politics/stay-at-home-parents-subsidies.html
    nytimes.com·28 mentions
  23. 23
    Sanders, Casar to Introduce Legislation to Ban Artificial Superintelligence and Temporarily Pause Advanced AI Development
    senate.gov·26 mentions
  24. 24
    Introducing GPT-6 Astra: the most intelligent and aligned model in the world.
    youtube.com·26 mentions
  25. 25
    Jobs report August 2026:
    cnbc.com·25 mentions
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Past Weeks

September 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.

Why rank by newsletters instead of total links?

Ranking by the number of distinct newsletters citing a link measures how widely it resonated across independent writers. A single newsletter repeating the same link many times cannot push it up the list.

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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