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SpaceXAI has open-sourced the Grok Build framework, a Rust-based system powering its coding CLI, including an agent loop, tool layer, and TUI. The underlying Grok 4.5 model remains closed-source.
SpaceXAI and Cursor are set to launch their first jointly developed AI model as early as Wednesday, competing against industry leaders like Anthropic’s Opus 4.8 and OpenAI’s GPT-5.5.
SpaceXAI has lost over 50 employees since February, raising concerns about burnout, leadership instability, and retention challenges following its merger with xAI.
