Apple Inc. is facing challenges in upgrading its AI voice assistant, Siri, due to difficulties integrating advanced large language models. These integration issues have led to software bugs and delays in the rollout of updated Siri features. The struggles have raised concerns among investors about Apple's overall AI strategy. Additionally, the launch of Apple's AI services in China has been delayed, reportedly due to ongoing US-China tensions. These developments were reported by the Financial Times and highlight obstacles Apple is encountering as it attempts to enhance its AI capabilities amid a competitive technology landscape.