AI news story

Substack’s new tool tells you who’s been writing their newsletters with AI

Substack is giving readers a way to estimate how much of a newsletter was written by AI, signaling a broader shift toward trans…

  • AI
  • Source: TechCrunch
  • Published: 2026-07-22

Editor's take

Substack has introduced a feature allowing readers to gauge the proportion of AI-generated text within newsletters. This development addresses growing concerns about authenticity and attribution as generative AI tools like GPT-4 become more accessible to content creators.

The move is significant because it provides a tangible mechanism for readers to assess the human element in their subscribed content, a critical factor for trust and engagement. For creators, it introduces a new layer of accountability, potentially influencing editorial decisions and the perceived value of human authorship on platforms that have championed independent voices. This reflects a broader industry push to differentiate AI-augmented work from purely human output.

Future developments will likely center on the accuracy and adoption of such detection tools, and whether other platforms follow suit. The evolving landscape of AI content generation, including sophisticated models that mimic human nuance, will continue to challenge these detection capabilities and raise questions about the definition of "original" content.