8 September 2026 · SEO & GEO · Grégory Camus
On 7 September 2026, Carolyn Shelby, Principal SEO at Yoast and founder of CSHEL Search Strategies, published in Search Engine Journal an analysis of the factual errors generative AI makes about companies. When ChatGPT, Perplexity or Google's AI Overviews name a former executive, a discontinued product or an outdated price, the cause is most often an accumulation of conflicting versions of the same fact, published at different times and never linked to one another, even though the correct information exists somewhere online.
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5 September 2026 · Digital advertising · Kenza Battache
Since 3 September 2026, Reddit has opened its AI-driven advertising campaigns, Max Campaigns, to all advertisers; they had been limited to a restricted group since January (Social Media Today). For brands that already manage their social presence and their paid campaigns, the launch adds a channel to weigh up alongside Google and Meta, with figures quoted by Reddit itself: 17% lower cost per acquisition and 27% more conversions.
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5 September 2026 · AI training · Xavier Lesueur
On 1 September 2026, Anthropic launched Claude Fable 5.1 and Claude Mythos 5.1, one model under two levels of safeguards, with a 75% cut in the price of cache reads (VentureBeat). For a company already using Claude, the real saving sits between 25 and 45% according to Anthropic, and depends on how its teams work with the tool: the price of input and output tokens does not move.
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5 September 2026 · SEO & GEO · Grégory Camus
On 3 September 2026, SEO consultants noticed that AI Mode answers generated by Gemini 3.8 Flash, the model added the previous day to the menu for Google AI Pro and Ultra subscribers, no longer showed any link or citation on informational queries (Search Engine Roundtable). On 4 September, Robby Stein, vice-president of product for Google Search, acknowledged a malfunction and announced a fix; that same morning, the links reappeared (Search Engine Land).
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5 September 2026 · Content & Social media · Hugo Hamot
On 3 September 2026, OpenAI launched GPT-6 Astra, presented as its “smartest and best-aligned” model (official announcement). Beyond the benchmark scores, the demonstration that matters to a creative studio comes down to three examples: a slide deck produced on OpenAI's own presentation template, a house modelled in Blender then made walkable in Unreal Engine 5, and websites hosted directly from ChatGPT.
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