Elon Musk's xAI secures $6 billion in Series B funding, boosting its valuation to $18 billion.

Investment led by Andreessen Horowitz, Sequoia Capital, and includes Saudi Prince Al-Waleed bin Talal.

Funding aims to market xAI's products, develop advanced infrastructure, and accelerate R&D of future technologies.

xAI focuses on creating advanced AI systems that are truthful, competent, and beneficial for humanity.

The flagship product, Grok, competes with OpenAI's ChatGPT and will be powered by the largest Nvidia GPU cluster.

xAI has ties to X (formerly Twitter), which owns a stake and offers Grok as an add-on for subscribers.

The funding raise is expected to improve X's financial outlook and disrupt the AI landscape.