Migrate from Anthropic to DeepSeek v4, the startup saved millions of dollars and achieved a performance boost

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

To run DeepSeek v4, the team developed a large amount of infrastructure and internal tools at the base level, with actual workload reaching 100 times the initial estimation. In terms of server vendors, Lindy evaluated all major players and surprisingly opted for the relatively less popular cloud computing provider, Atlas Cloud.

Although the user-side has been fully phased out, Lindy's internal staff's programming and office needs continue to use the Anthropic model, mainly due to the significant discounts from large customer contracts. The system also retains Claude Opus as a fallback solution, which is automatically invoked when DeepSeek v4 fails in complex tasks. Crivello believes that the low-cost strategy of Chinese large models will bring long-term profit pressure to American counterparts, but Anthropic's corporate relationships and brand advantage still serve as a moat.