Anthropic's Claude Max HAS STOPPED SUPPORTING Third Party Apps.. OpenCode,Kilo,Cline,Roo access gone

Anthropic has begun cracking down on third-party applications that were previously able to access Claude Max subscriptions. Popular coding applications like Crush (formerly Cline) have officially removed support for Claude providers, while OpenCode now produces authorization errors when attempting to use Claude Max credentials. The blocking mechanism works by matching system prompts - applications that use the same system prompt as official Claude interfaces can still function, while those with different system prompts are blocked. This means most graphical interfaces for Claude continue to work, but specialized coding tools and agentic applications that modify system prompts are now restricted. The speaker suggests this move is financially motivated, as power users who relied on third-party interfaces were likely high-cost customers. The restriction is criticized as being similar to Apple's closed ecosystem approach, especially when compared to competitors like GLM and Minia whose coding plans work with any application. The speaker argues Anthropic should have instead made their API directly available with rate limits rather than restricting interface choice.