The city government model Rio3.5 has emerged as a top performer in recent benchmarks, beating out rival Qwen3.7 by a narrow margin.[1091223] Researchers at the University of Rio de Janeiro claim that their 'homegrown' LLM is actually a merge of an existing model, sparking questions about its true capabilities.[1092814] Despite concerns over its origins, Rio3.5 has shown remarkable promise in tackling complex tasks, such as natural language processing and machine learning.[1091223] As the AI landscape continues to evolve, cities like Rio de Janeiro are poised to take a leading role in shaping the future of intelligent systems.[1092814][1091223] While Qwen3.7 remains a formidable opponent, Rio3.5's innovative approach has earned it a spot as one of the top AI models in recent tests.[1091223]