Elon Musk’s SpaceXAI on Wednesday launched Grok 4.5, what it calls its newest and “smartest” artificial intelligence model to date, on the same day as competitor OpenAI rolled out its new ChatGPT model.

The newest Grok model is advertised as a coding and engineering model and is now the default model in Grok Build, SpaceXAI’s software development platform, and will be available on all Cursor plans. Grok 4.5 is the company’s first release since going public and acquiring the startup Cursor.