A16Z co-founder Marc laments that the open-source DeepSeek R1 is a gift to the world. Yesterday, I paid to activate the DeepSeek API, and today I used the dify agent platform to build a personal agent that automatically reads web page content and performs summary analysis. Today, I tested Vitalik's short essay by using Jina to read web content and DeepSeek R1 for summary analysis. The results were very good, and the cost was only a few cents.