SpaceXAI launches Grok 4.5

SpaceXAI launched Grok 4.5, a model that is designed to outperform on coding, agentic tasks and knowledge work, in a move that highlights why the company acquired Cursor for $60 billion.

The company said Grok 4.5 was trained alongside its Cursor unit.

Shortly after its IPO, SpaceX said it has exercised its option to buy Cursor for $60 billion. The deal is expected to close in the third quarter. The news isn't surprising given it was telegraphed leading up to the SpaceX IPO. SpaceX recently became SpaceXAI.

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Grok 4.5 is on par with Anthropic Claude Opus 4.8 and serves as SpaceXAI's first volley in the model wars. The Grok 4.5 launch comes as OpenAI outlined GPT-Live, a voice model that can listen and speak at the same time.

What Grok 4.5 indicates is that SpaceXAI plans on being in the LLM race.

SpaceXAI said the Grok 4.5 was trained across "tens of thousands of NVIDIA GB300 GPUs" with investments in "data filtering and curation: deduplication, quality scoring, and domain-focused selection so that the data mixture stayed high-coverage and high-signal."

Key points from SpaceXAI:

• Grok 4.5 excels in coding and app building.
• The LLM is designed for speed and token efficiency.
• Grok 4.5 is the default model in Grok Build.
• Grok 4.5 is aimed to take share with better pricing. The LLM is priced at $2 per million input tokens and $6 per million output tokens. SpaceXAI claims Grok 4.5 has 2x the token efficiency and can solve task at half the number of steps.
• Grok 4.5 is available in Grok Build, in Cursor across all plans and the SpaceXAI console.