The latest large language model, Claude 2.1 LLM, released by Anthropic has garnered significant attention. This model features a context window length of up to 200K, marking a significant breakthrough over current mainstream models in the market. With reduced hallucination phenomena, tool APIs, and system prompts, the new model greatly enhances user experience. The introduction of a 200K context window means the model can retain more information when processing tasks, reaching up to 150,000 words of data tokenization. The launch of Claude 2.1 LLM signifies continuous innovation and escalating competition in the field of language models.