{"type": "article", "title": "In Game Theory Twist, OpenAI Also Signs Open Source AI Letter Leaving Anthropic As Most Prominent Non-Signatory", "publisher": "Web Pulse", "url": "https://wpnews.pro/news/in-game-theory-twist-openai-also-signs-open-source-ai-letter-leaving-anthropic", "original_source": "https://officechai.com/ai/in-game-theory-twist-openai-also-signs-open-source-ai-letter-leaving-anthropic-as-most-prominent-non-signatory/", "published": "2026-07-25T06:21:20+00:00", "accessed": "2026-07-25", "id": "in-game-theory-twist-openai-also-signs-open-source-ai-letter-leaving-anthropic"}