Five minutes. What happened, and what to do about it. All stories from 6 October 2026
ChatGPT will show picture ads while people make images, and adds tools to measure them
A new visual ad format starts testing in the US this month, with proof from early advertisers.
OpenAI will add an invisible watermark to ChatGPT text in the EU in the coming weeks
OpenAI· 5 OctTo meet the EU AI Act, OpenAI will add an invisible watermark, called textGrain, to eligible ChatGPT and Codex text in the European Union over the coming weeks. API customers worldwide can opt in from today, and it stays off by default. Detection is limited to approved researchers at first. OpenAI says swapping 10 percent of words with synonyms cut detection from about 92 to 66 percent, and 25 percent cut it to 17.
- Do not treat any AI detector as proof that a person used AI: OpenAI itself says the signal is weaker on short or edited text.
- If you publish AI-assisted copy in the EU, keep a simple note of where AI was used, since transparency rules are tightening.
Source: OpenAI. This is our short summary of their reporting. The paragraphs marked "Our read" and the things to do are SeedFoundry's opinion. The summary is drafted with AI tools. The picture is our own graphic. How we source and credit
These are short summaries of other people's reporting, with our own commentary. Each story names its source and links to the original. How we source and credit