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 transparency around AI-assisted content.

Your ChatGPT writing quality dip wasn’t in your head

OpenAI CEO Sam Altman says GPT-5’s writing got harder to read because the company prioritized coding and reasoning. He’s promising GPT 5.x will bring back clearer prose without losing technical gains.
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