SpaceXAI launched Grok 4.5 on July 8, marking the rebranded AI division's first serious push into enterprise markets with a model built specifically for coding and agentic tasks.

The release follows SpaceX's $60 billion acquisition of Cursor in June and comes ahead of the company's $75 billion IPO. SpaceXAI, formerly known as xAI until its July 6 rebrand, trained the model alongside Cursor's platform.

Training and Technical Specifications

SpaceXAI trained Grok 4.5 on trillions of tokens of Cursor data using Nvidia's GB300 platform, which combines GPUs and CPUs. The company said it invested heavily in data filtering and curation while scaling reinforcement learning with a focus on per-token intelligence.

The model enables interactions with existing software and developer-agent workflows. While optimized for coding, Grok 4.5's training data is broader than Cursor's Composer 2.5 model, with both designed to be complementary.

"The idea, I guess, is to continue to push the popularity of Cursor among developers," said Lian Jye Su, an analyst at Omdia.

Competitive Positioning

Grok 4.5 aims to compete with established coding models including Claude Code from Anthropic and Codex from OpenAI. Previously, SpaceXAI's Grok models primarily served consumers on Musk's X platform with limited enterprise adoption.

SpaceXAI priced Grok 4.5 at $2 per million input tokens and $6 per million output tokens, claiming twice the token efficiency of competitors. By comparison, Claude Opus 4.8 costs $5 per million input tokens and $25 per million output tokens, while OpenAI's GPT-5.6 Sol costs $5 per million input tokens and $30 per million output tokens.

"One of the ways to sustain that competitiveness is by lowering the token cost," Su said. However, he noted that pricing alone is unlikely to drive enterprise adoption away from established platforms.

Grok 4.5 is available through Grok Build, Cursor, and the SpaceXAI console. The model represents SpaceXAI's effort to expand beyond its X platform association into broader enterprise markets.