<s>[INST] What is the tallest building in the world? [/INST] As of February 2023, the 828-metre (2,717 ft) tall Burj Khalifa in Dubai is and has been the tallest building since 2010.</s>\ <s>[INST] Wow that's tall, but how tall is its spire? [/INST] Approximately 242.6 meters, or 796 feet.</s>\ <s>[INST] 796 feet for the spire seems excessive, does it serve a purpose other than cosmetic? [/INST] 