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Most US AI assistants reportedly run on Claude under the hood

Original: 🍺 Five labels, one brewery. Claude sits in five of seven US assistants: Claude, Copilot, Perplexity, Grok and Google's a

A commentary circulating online claims that Claude, developed by Anthropic, powers the underlying models of five of seven major US AI assistants — including Microsoft Copilot, Perplexity, Grok and Google's apps — with only OpenAI's ChatGPT and Meta building their own. The author argues that for small European businesses, branding matters less than actual costs when choosing an assistant.

Why now: People are debating how concentrated the AI market is, with most assistant brands relying on the same small number of underlying models.

AnthropicClaudeMicrosoft CopilotPerplexityGrok

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Evidence

• 🍺 Five labels, one brewery. Claude sits in five of seven US assistants: Claude, Copilot, Perplexity, Grok and Google's apps. Only ChatGPT and Meta's Muse brew their own. For EU small firms, the logo says less than the invoice 👉 https:// signaldigital.net/2026/10/07/f… · signaldigital · 2

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