SpaceXAI Launches Grok 4.5 Following Cursor Acquisition

Following the acquisition of xAI in February 2026, Elon Musk rebranded the company as SpaceXAI, integrating its AI operations into the broader SpaceX structure. The strategic shift focuses on addressing AI resource demands, with Musk predicting that space-based compute will be the most cost-effective method for generating AI compute within three years.

On July 8, 2026, SpaceXAI released Grok 4.5, a flagship model optimized for coding, finance, and agentic automation. The model was developed in partnership with Cursor, an AI coding startup acquired by SpaceX for $60 billion in an all-stock deal. Trained on tens of thousands of Nvidia GB300 GPUs, Grok 4.5 is positioned as a high-speed, cost-efficient alternative to rivals, with pricing set at $2 per million input tokens and $6 per million output tokens.

Musk described Grok 4.5 as an "Opus-class model" that is faster and more token-efficient than Anthropic's Opus 4.7. The release coincides with OpenAI's rollout of GPT-Live and the limited release of GPT-5.6 Sol, which the U.S. government had previously delayed over national security concerns. While available via Grok Build, Cursor, and the SpaceXAI console, the model's European Union release is postponed until mid-July. Beyond model development, SpaceXAI provides compute access to competitors Google and Anthropic through its Colossus data centers.