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.Prior to the Grok 4.5 release, Musk posted to X and said the decision to release was based on “strong positive feedback from customers in our beta test program.” The model is not yet available in the European Union.
“Our internal assessment is that Grok 4.5 is roughly comparable to Opus 4.7, but much faster,” Musk said of the new software, comparing it to Anthropic’s Claude software. “The combination of capability, faster speed and lower cost is what makes it competitive.”On the Grok 4.5 launch announcement, a chart claims the new model also outperforms Opus 4.8. The new model from SpaceXAI was trained using the same compute capacity, or raw processing power, hardware, and electrical energy that the company leases to Anthropic and Google.Grok 4.5 is priced at $2 per million input tokens and $6 per million output tokens. Tokens are the building blocks that large language models use to process and generate information. Claude’s Opus 4.8 costs $5 per million input tokens and $25 per million output tokens.OPENAI ROLLS OUT LATEST VERSION OF CHATGPT TO PUBLIC AFTER TRUMP PAUSE REQUESTThe release of Grok 4.5 falls on the same day Musk’s competitor, Sam Altman’s OpenAI, released ChatGPT 5.6 Sol, Luna, and Terra. The models are the newest versions of the company’s chatbot, which were previously restricted by the Trump administration.In comparison to Grok 4.5, GPT 5.6 is priced at $1 per million input tokens and $6 per million output tokens. Musk announced Grok’s latest model shortly after OpenAI’s announcement.
