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SpaceX Unveils Grok 4.5 AI Model Developed with Cursor, Expands Beta Testing
On July 8, SpaceX’s artificial‑intelligence unit, xAI, announced the launch of Grok 4.5, a new model that emerged from a collaboration with coding‑AI startup Cursor. The xAI blog describes the system as “built to excel at coding, agentic tasks, and knowledge work,” and calls it the company’s strongest model yet.
The announcement follows SpaceX’s June purchase of Cursor for $60 billion, a move that folded the San Francisco‑based firm into the xAI portfolio. According to the blog, Grok 4.5 was trained alongside Cursor’s code‑generation technology, producing a model that the company says is faster, more token‑efficient and cheaper to run than previous iterations.
Elon Musk, who heads SpaceX and xAI, posted on X that the new model is an Opus‑class AI and will be opened to a wider audience once private‑beta feedback turns positive. He added that Grok 4.5 could rival Anthropic’s Claude Opus—a claim that follows a June report that the model had already entered private beta at SpaceX and Tesla.
Market data from Seeking Alpha, citing Apptopia, shows that the Grok app’s average daily users fell 28 % since April. The app’s market share was 8.7 % last month, down from 10.6 % in May, while OpenAI’s ChatGPT remained the top‑ranked AI in the United States in June.
In related news, the Wall Street Journal reported that SpaceX had shown a handset‑style AI device prototype to investors before its June IPO. The device, described as slimmer than an iPhone, would run on a proprietary operating system and integrate xAI technology. Musk later denied the report on X, calling it “utterly false.” The device would connect via SpaceX’s Starlink satellite network and a direct‑to‑cell service that bypasses terrestrial carriers.
The combination of a hardware endpoint, xAI models and satellite connectivity would give SpaceX a unique position in the consumer AI market, the article noted. However, past attempts at AI‑enabled hardware—from Google Glass to the Humane AI Pin—have struggled to achieve widespread adoption.
SpaceX’s merger with xAI in February was valued at approximately $1.25 trillion, according to Reuters. The acquisition was part of a broader strategy that also included a joint venture with Tesla to build a semiconductor fabrication plant.
SpaceX’s initial public offering on June 12 raised $86 billion, making it the largest IPO in history. The company’s ticker, SPCX, is listed on Nasdaq.
The new AI development comes as SpaceX seeks to expand its vertical platform model, combining launch, satellite connectivity and AI services. Grok 4.5 is a key component of that strategy, offering a coding‑focused AI that can be integrated into a range of products.
At present, Grok 4.5 remains in private beta, with plans to broaden access after further testing. The device prototype remains unverified, and no official launch date has been announced. The decline in Grok app usage suggests that the company may need to refine its consumer strategy.
SpaceX’s next steps will likely involve continued beta testing at SpaceX and Tesla, potential public release of Grok 4.5, and further development of the hardware‑AI‑satellite integration. The company’s recent acquisitions and IPO position it to pursue these initiatives with significant capital and infrastructure.
In summary, SpaceX has introduced Grok 4.5, a new AI model built with Cursor, and is expanding its beta testing. The model is positioned as a fast, token‑efficient, Opus‑class AI that could compete with Anthropic’s Claude Opus. Market data indicates a decline in Grok app usage, while SpaceX’s hardware prototype remains unverified. The company’s recent IPO and acquisitions provide a foundation for future AI and hardware integration.
The announcement follows SpaceX’s June purchase of Cursor for $60 billion, a move that folded the San Francisco‑based firm into the xAI portfolio. According to the blog, Grok 4.5 was trained alongside Cursor’s code‑generation technology, producing a model that the company says is faster, more token‑efficient and cheaper to run than previous iterations.
Elon Musk, who heads SpaceX and xAI, posted on X that the new model is an Opus‑class AI and will be opened to a wider audience once private‑beta feedback turns positive. He added that Grok 4.5 could rival Anthropic’s Claude Opus—a claim that follows a June report that the model had already entered private beta at SpaceX and Tesla.
Market data from Seeking Alpha, citing Apptopia, shows that the Grok app’s average daily users fell 28 % since April. The app’s market share was 8.7 % last month, down from 10.6 % in May, while OpenAI’s ChatGPT remained the top‑ranked AI in the United States in June.
In related news, the Wall Street Journal reported that SpaceX had shown a handset‑style AI device prototype to investors before its June IPO. The device, described as slimmer than an iPhone, would run on a proprietary operating system and integrate xAI technology. Musk later denied the report on X, calling it “utterly false.” The device would connect via SpaceX’s Starlink satellite network and a direct‑to‑cell service that bypasses terrestrial carriers.
The combination of a hardware endpoint, xAI models and satellite connectivity would give SpaceX a unique position in the consumer AI market, the article noted. However, past attempts at AI‑enabled hardware—from Google Glass to the Humane AI Pin—have struggled to achieve widespread adoption.
SpaceX’s merger with xAI in February was valued at approximately $1.25 trillion, according to Reuters. The acquisition was part of a broader strategy that also included a joint venture with Tesla to build a semiconductor fabrication plant.
SpaceX’s initial public offering on June 12 raised $86 billion, making it the largest IPO in history. The company’s ticker, SPCX, is listed on Nasdaq.
The new AI development comes as SpaceX seeks to expand its vertical platform model, combining launch, satellite connectivity and AI services. Grok 4.5 is a key component of that strategy, offering a coding‑focused AI that can be integrated into a range of products.
At present, Grok 4.5 remains in private beta, with plans to broaden access after further testing. The device prototype remains unverified, and no official launch date has been announced. The decline in Grok app usage suggests that the company may need to refine its consumer strategy.
SpaceX’s next steps will likely involve continued beta testing at SpaceX and Tesla, potential public release of Grok 4.5, and further development of the hardware‑AI‑satellite integration. The company’s recent acquisitions and IPO position it to pursue these initiatives with significant capital and infrastructure.
In summary, SpaceX has introduced Grok 4.5, a new AI model built with Cursor, and is expanding its beta testing. The model is positioned as a fast, token‑efficient, Opus‑class AI that could compete with Anthropic’s Claude Opus. Market data indicates a decline in Grok app usage, while SpaceX’s hardware prototype remains unverified. The company’s recent IPO and acquisitions provide a foundation for future AI and hardware integration.
