US tech shares are poised to open lower amid concerns that Chinese AI startup DeepSeek could disrupt the AI growth narrative that has fueled the US stock rally. DeepSeek's recent open-source AI model, developed at a fraction of the cost of US counterparts, raises fears of potential price wars in the AI sector.Despite these concerns, the overall AI market may still expand, with lower costs potentially accelerating adoption across various industries. Big tech companies, like Meta, continue to commit significant capital to AI infrastructure, indicating that their investment strategies remain robust despite emerging competition.