Are Arabic Benchmarks Reliable? QIMMA's Quality-First Approach to LLM Evaluation. - Leen AlQadi; Ahmed Alzubaidi; Mohammed Al-Yafeai; Hamza Alobeidli; Maitha Alhammadi; Shaikha Alsuwaidi; Omar Alkaabi; Basma El Amel Boussaha; Hakim Hacid (CoRR, 2026)