Musk Says Grok 4.6 Will Launch in Two Weeks to Challenge Kimi K3
Grok is a central part of Elon Musk’s push to compete in the fast-moving large language model market. The contest with Kimi K3 matters beyond headline model size, as developers increasingly weigh reasoning performance against computing costs and token efficiency. Grok 4.6 is described as a 2-trillion-parameter model trained with SpaceX engineering data, while Kimi K3 has 2.8 trillion parameters.
Musk said on X that Grok 4.6 would be released two weeks after his announcement, with Grok 4.7 following four weeks later, though he did not provide exact calendar dates. The stated goal is for Grok 4.6 to match or surpass Kimi K3 in reasoning while maintaining high token efficiency. No training cost, pricing details or comprehensive benchmark results were disclosed with the launch timetable.
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The history behind this eventMusk Says Grok 4.5 Will Launch July 9 to Take On GPT-5.6
As competition in generative AI intensifies worldwide, Elon Musk’s SpaceXAI is expanding into AI coding agents and office-software integration through its acquisition of the popular development tool Cursor. The move is aimed at challenging the dominance of rivals such as OpenAI and improving the model’s practical capabilities with real-world developer interaction data, attracting close attention from the technology industry and investors.
SpaceXAI said it would formally release Grok 4.5, its most powerful model, on July 9. Built on a 1.5-trillion-parameter base model, it is the company’s first model trained with Cursor’s IDE interaction data. Positioned as a faster, lower-cost offering, Grok 4.5 will go head-to-head with OpenAI’s GPT-5.6 Sol, launching the same day, as the companies compete for enterprise customers.
Grok 4.3 Beta Opens to Subscribers as Musk Says 1T Flagship Nears Training Completion
Elon Musk-founded xAI is using its Grok series to challenge OpenAI, Google and Anthropic. Grok 4.3 brings long-context processing, document handling and agent capabilities into a subscription service. The release is part of the generative AI industry’s shift from chatbots toward systems that can perform tasks and operate computers, while also reflecting the continued move toward premium pricing tiers for advanced models.
As of July 19, 2026, xAI had opened the Grok 4.3 beta to SuperGrok Heavy users paying $300 a month, with support for a 2-million-token context window and PDF operations. Musk said initial training of the 1T flagship model, with 1 trillion parameters, was expected to finish within five days, or around July 24. xAI also launched Grok Computer, which can execute multistep desktop tasks.
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