Claude 3, a model developed by Anthropic, has surpassed OpenAI's GPT-4 in various evaluations and leaderboards, including the Chatbot Arena. Haiku, another model by Claude, has also outperformed GPT-4 in certain instances. Claude 3 Opus is now ranked as the top AI model, leading to GPT-4 being relegated to the second position. This shift in dominance marks a significant event in the realm of large language models.