Elon Musk’s SpaceXAI is launching Grok 4.5, its smartest model yet, and its first release since going public and acquiring the AI coding startup Cursor. The new model is being pitched as a coding and agentic-work tool, more than a consumer-facing chatbot — one that Musk says is “maximally truth-seeking” compared to its competitors. The company says Grok 4.5, trained alongside Cursor, outperforms comparable models on engineering and knowledge work. “It is an Opus-class model, but faster, more token-efficient and lower cost,” wrote Musk in a post on X, referencing what was until recently Anthropic’s top model family. A chart accompanying the announcement says the model outperforms Opus 4.8 on several key benchmarks. Grok 4.5 is available today in Grok Build, in Cursor on all plans, and from the SpaceXAI console, though Grok 4.5 is not yet available in the EU.

Full report : Grok 4.5 is available in Grok Build, in Cursor, and from the SpaceXAI console, but not in the EU; it costs $2 per 1 million input tokens and $6 per 1 million output tokens.