币界网报道：OpenAI plans to acquire AI programming platform Windsurf for approximately $3 billion, which has stimulated the competitive nerves in the AI Coding tool market. During the transaction, Anthropic restricted Windsurf's access to the Claude series of models, and even did not grant access qualifications on the day Claude 4 was released. Windsurf CEO Varun Mohan publicly complained on social media that he received less than five days' notice, which affected the availability of Claude 3.x models in the short term. Windsurf was originally a GPU virtualization startup. In 2022, it transformed into an AI programming IDE that supports multiple models, with annualized revenue exceeding $100 million and hundreds of thousands of daily active users. After being acquired by OpenAI, its "model optional" label became embarrassing, Anthropic stopped supplying Claude models, and users had to access the API themselves, which was a complicated and costly process. Anthropic's move was seen as a statement of its camp against OpenAI, giving priority to supporting "sustainable partners" to prevent data from flowing to competitors. Anthropic is backed by investments from Google and Amazon, and OpenAI is deeply tied to Microsoft, with both parties competing for developer access. Anthropic is also promoting its own products such as Claude Code to strengthen its competitiveness. OpenAI acquired Windsurf to enhance developer tool capabilities and compete for market share, but this move may lead to the platformization and closure of the AI programming market, and developers are worried about the fragmentation of the tool ecosystem in the future. The Windsurf supply suspension marks the official start of the chassis battle between AI giants.