SpaceX releases Grok 4.5, first model built alongside Cursor
Published: 12:55 09 Jul 2026 EDT
SpaceX Corp (NASDAQ:SPCX) released Grok 4.5, the company's first major update to its AI model built in collaboration with Cursor, targeting coding and agentic workflows as the company pushes further into the enterprise AI market.
The 1.5 trillion parameter model was trained on tens of thousands of GB300 GPUs and builds on Grok 4.3, which launched in April 2026.
SpaceX said Grok 4.5 delivers performance close to Anthropic's Claude Opus 4.8 and OpenAI's GPT 5.5, while offering lower pricing and greater token efficiency.
Grok 4.5 is priced at $2 per 1 million input tokens and $6 per 1 million output tokens, compared with $5 and $25 for Opus 4.8, $10 and $50 for Fable 5, and $5 and $30 for GPT 5.5.
SpaceX said the model uses approximately 16,000 tokens per SWE-Bench Pro task, versus 67,000 for Opus, a roughly 4.2 times improvement in efficiency. The company reported sizeable gains across agentic and coding benchmarks compared with Grok 4.3, along with continued advances in knowledge and reasoning tasks.
The release comes as SpaceX targets what UBS estimates is a $23 trillion enterprise AI total addressable market. UBS said SpaceX is entering the enterprise market from a relatively low base but is building momentum through an expanding product portfolio and improving customer adoption.
OpenAI is expected to release GPT 5.6 in the coming days, a launch UBS said should raise the competitive benchmark across AI labs and underscores the importance of continued model advancement.
UBS rates SpaceX shares Buy with a $210 price target, based on a sum-of-the-parts approach valuing the Space segment at 24 times 2028 estimated revenue, Connectivity at 30 times 2028 estimated EBITDA, and AI at 28 times 2028 estimated EBITDA.
