Best AI Model 2025: Claude 4.5 vs ChatGPT 5.1 vs Gemini 3
In the closing stretch of 2025, three frontier models have effectively defined the state of AI: Anthropic’s Claude Opus 4.5, OpenAI’s ChatGPT 5.1 (GPT-5.1), and Google DeepMind’s Gemini 3 Pro. Each sits at the top of its respective stack. Each claims “state-of-the-art” status. And each is, in practice, very good at slightly different things. All…