Windsurf CEO reveals that Anthropic is restricting access to Claude AI models

AI coding startup Windsurf has said that Anthropic has removed almost all access to their Claude 3.7 Sonnet and Claude 3.5 Sonnet AI models. CEO Varun Mohan said that Anthropic’s decision to block first-party access was done with “less than five days of notice,” in a post on X. 

“Given the short notice, we may see some short-term Claude 3.x model availability issues as we have very quickly ramped up capacity on other inference providers, but we believe we have now secured sufficient near term capacity,” he went on. 

Last month, post the launch of Anthropic’s latest Claude Sonnet 4 and Opus 4 models, Mr. Mohan wrote in another post on X that the AI firm hadn’t given direct access to them. 

He added that Windsurf has been “very clear to Anthropic that this is not our desire,” and that they want to pay them for the “full capacity,” but the short notice and the eventual decision by Anthropic was “disappointing.” 

However, he said that they had worked to make Windsurf work much better with Gemini 2.5 Pro as an alternative. “Gemini 2.5 Pro (now very high quality on Windsurf, new 0.75x promo rate), GPT 4.1, and more are all unaffected,” he stated in the same post. 

It was reported in April that Anthropic rival, OpenAI was in talks with Windsurf to acquire them as the AI vibe coding segment heat up.