en.Wedoany.com Reported - Cursor and SpaceXAI plan to release their first jointly developed AI model on Wednesday (July 8). The initial release was scheduled for earlier this week but was postponed to improve model efficiency, according to The Information, citing internal employee emails.

According to the same email, the model is fast and can compete with Anthropic's Opus 4.8 and OpenAI's GPT 5.5 in certain aspects. The wording is cautious, as this is an internal evaluation, not an independent benchmark result—the model has no public benchmarks yet. Neither SpaceXAI nor Cursor responded to requests for comment.

The model began training before the deal was announced: In June, SpaceX agreed to acquire Cursor in a $60 billion stock deal. At the Compile conference, Cursor CEO Michael Truell stated that the model has over 1.5 trillion parameters, was trained from scratch on the Colossus supercomputer, does not rely on open-source Chinese architectures (such as Kimi, which previously served as the foundation for Composer), and will directly compete with models from Anthropic and OpenAI. The training computation is an order of magnitude greater than its predecessor.

At the end of June, Elon Musk stated that SpaceX and Tesla employees had already tested the joint development in closed beta, and he rated its level as "close to Opus, possibly surpassing it." The model is expected to appear in both Cursor itself and the xAI developer toolset Grok Build, as well as potentially on the Grok web version—recently, mentions of Grok 4.5 were spotted.