Spent a month using AI to build a quantitative strategy development platform for cryptocurrencies. During the process, I used opus4.6, sonnet4.6, chatgpt5.3, gemini3, and some domestic LLMs like MINIMAX and DOUBAO. In summary, for coding, claude opus is almost miles ahead despite being slower and more expensive. Gemini's advantage is speed, chatgpt's coding ability is similar to sonnet, and these domestic large models are basically at an elementary school level.