Meta-analysis of large language models: benchmarking DeepSeek-R1 against ChatGPT, Gemini, Qwen, and LLaMA. - Shafique Ahmed Awan; Muazzam Ali Khan Khattak; Abdullah Ayub Khan; Anwar Ali Sathio; Jamil Abedalrahim Jamil Alsayaydeh; Rex Bacarra; Safarudin Gazali Herawan; Rehman Aziz (J. Big Data, 2026)