DeepSeek Doubles Down on Harness Talent as AI Strategy Shifts from Light to Heavy

DeepSeek is pivoting from lightweight AI model development to a heavy infrastructure focus, highlighted by its new Harness division. On June 21, team lead Cui Tianyi launched an online recruitment drive for researchers and engineers, emphasizing the company's commitment to agent infrastructure. Formed in March 2025, the Harness team operates on a core formula of Model plus Harness equals Agent, aiming to transform model capabilities into deployable products. Since late 2025, DeepSeek has enhanced agent capabilities, reflecting a growing trend in AI systems.