Anthropic allows crawling while OpenAI and xAI block it

AaronBergman18 · x · 2026-08-19

A long-running sitemap monitor reveals significant differences in AI companies' crawler policies: Anthropic fetches without issues, while OpenAI's behavior appears suspicious and often fails. xAI has started to explicitly block vanilla HTML requests. This data provides a real-world glimpse into the varying openness and data access strategies of major AI labs.

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