Deprecated Anthropic and switched to DeepSeek v4, helping startups save millions of dollars, with performance not only maintained but improved.

According to Beating monitoring, iMessage’s native AI assistant Lindy founder Flo Crivello announced that it has switched all user-side business traffic from Anthropic to the open-source model DeepSeek v4. After the switch, not only has the company saved millions of dollars, but in many core business scenarios it has also achieved performance improvements.

To run DeepSeek v4, the team developed a large amount of foundational infrastructure and internal tools at the underlying level, and the actual workload reached 100 times the expected amount. In choosing a server provider, Lindy evaluated all major industry players, and ultimately—somewhat unexpectedly—selected the relatively less well-known cloud computing provider Atlas Cloud.

Although the user side has been completely cut over, Lindy’s internal staff still use the Anthropic model for programming and office needs, mainly thanks to extremely high enterprise-customer contract discounts. The system also retains Claude Opus as a contingency plan, which is automatically called when DeepSeek v4 fails on complex tasks. Crivello believes that China’s low-priced large-model strategy will create long-term profit pressure for U.S. peers, but Anthropic’s enterprise relationships and brand advantages remain a moat.