What chimp has the highest IQ?

As of my last update, specific IQ scores for chimpanzees are not universally standardized like they are for humans, making it difficult to definitively identify which chimp has the highest IQ. However, notable chimpanzees such as Washoe, who was taught sign language, and Kanzi, who demonstrated advanced comprehension of symbols, are often cited for their impressive cognitive abilities. Research on chimpanzee intelligence continues to evolve, highlighting their problem-solving skills and social learning capabilities.