Claude hits No. 1 on App Store as ChatGPT users defect in show of support for Anthropic's Pentagon stance
Business Insider
February 28, 2026
AI-Generated Deep Dive Summary
Claude, developed by Anthropic, has skyrocketed to the top of Apple's App Store as users defect from ChatGPT in support of Anthropic's stance against the Pentagon. OpenAI's recent agreement with the Department of War has sparked concerns among some loyal ChatGPT users, prompting them to switch to Claude. This shift is partly due to Anthropic's public disagreement with the Pentagon's deployment of AI models and its resistance to a "supply chain risk designation" that could restrict federal agencies from using its technology.
The agreement between OpenAI and the Department of War emphasizes human oversight in autonomous weapons systems and limits mass surveillance, as outlined by OpenAI CEO Sam Altman. However, this has raised ethical questions among users, with some feeling uneasy about OpenAI's alignment with government policies. In response, many have taken to social media to announce their defection, including pop musician Katy Perry and tech user Adam Lyttle, who shared screenshots of their switch on platforms like X.
On Reddit, ChatGPT users have flooded forums with posts declaring they are canceling their subscriptions, citing moral concerns over OpenAI's partnership. While some argue that Anthropic's own collaborations with Palantir and AWS raise similar ethical issues, others view the situation as a PR win for Anthropic, driven by its defiance of Pentagon policies.
The broader implications of this user migration highlight the growing competition in the AI space and the increasing importance of public perception in shaping market dynamics. As OpenAI solidifies its government ties, Anthropic is leveraging user loyalty and resistance to challenge its rival's dominance. This shift underscores how ethical stances and user sentiment can influence business outcomes in the rapidly evolving AI industry.
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Originally published on Business Insider on 2/28/2026