SpaceXAI has released its latest model, the Grok 4.5, its first since going public a few weeks ago.
In a blog post published Wednesday, SpaceXAI characterized its new release as a flagship product that can tackle all of the typical tasks that the AI industry has sought to automate: coding and app building, office and clerical work, research, writing, and other forms of mundane knowledge work.
Grok is thought to be able to do all this for less money, as SpaceXAI says its model is “twice as token efficient” as other leading models. That efficiency could be a big advantage for SpaceXAI if it is applied to real-world use cases, as the cost of tokens is a growing concern for AI consumers.
The company on Wednesday released benchmark metrics that show Grok’s competitiveness against other top models from SpaceXAI competitors, although it falls short of best-in-class.
In a post on his social media platform X (a subsidiary of SpaceXAI), founder Elon Musk compared the model to Opus, Anthropic’s LLM designed for intensive and complex tasks.
“Based on strong positive feedback from customers in our beta testing program, @SpaceXAI will make Grok 4.5 generally available tomorrow. It is an Opus-class model, but faster, more token efficient, and lower cost,” Musk wrote in a post about X.
Musk later added, “Internal evaluation is that Grok 4.5 is roughly equivalent to Opus 4.7, but much faster. The combination of features, speed, and lower cost makes it competitive.”
SpaceXAI says the new model will cost $2 per million input tokens and $6 per million output tokens. If Grok’s capabilities match SpaceXAI’s rhetoric, this could be quite competitive.
By comparison, Opus 4.7 costs $5 per million input tokens and $25 per million output tokens. OpenAI has tiered costs for each model version. The most expensive Sol costs $5 for 1 million input tokens and $30 for 1 million output tokens. On the other hand, the cheapest Luna costs $1 for 1 million input tokens and $6 for 1 million output tokens.
It’s a big week for AI model releases. OpenAI plans to release its latest and most powerful model, GPT 5.6, on Thursday. Release of the model was previously restricted by the Trump administration due to concerns about national security implications. OpenAI calls this its “most powerful model to date.”
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