The New Grok 4.5 Is Out. Elon Musk Says It Competes With Last Year's Claude Opus
DECRYPT ·
SpaceXAI released Grok 4.5 on July 8 at $2 per million input tokens and $6 per million output, less than half the price of comparable models from Anthropic and OpenAI. Elon Musk posted on X that the model is "roughly comparable to Opus 4.7," Anthropic's previous flagship, now superseded by Opus 4.8, while touting speed and cost over benchmark performance. Grok 4.5 is not available in the EU yet; SpaceXAI says European access is expected in mid-July. Elon Musk’s SpaceXAI released Grok 4.5 on Wednesday, its first public model since the SpaceX-xAI merger closed in February and SpaceX's pending $60 billion deal to acquire Cursor. It targets coders, engineers, and what the company calls "knowledge workers"—a category that apparently covers everyone from software developers to lawyers reviewing contracts to finance teams building Excel models. The company’s pitch isn't that it's the best model. It's that it's cheap, for a western model at least. Grok 4.5 costs $2 per million input tokens and $6 per million output. Claude Opus 4.8, Anthropic's primary flagship, runs $5 input and $25 output. GPT 5.6 Sol, OpenAI's new top-tier model that also launched Wednesday, is priced at $5 input and $30 output. Musk posted on X and clarified where his new model actually sits. He called it "roughly comparable to Opus 4.7, but much faster." Opus 4.7 is Anthropic's previous flagship; Opus 4.8 has since succeeded it. Claude Fable 5 is now Anthropic's top of the line offering.
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