Elon Musk's xAI has released the Grok 4, just five months after Grok 3's debut earlier this year. The latest model promises a quantum leap in performance, achieving perfect scores on math competitions ...

Grok 4.2 has no memory, so each prompt needs full context; use reasoning traces and source priority for clearer results.

Elon Musk-owned xAI is testing Grok 4.20, a new model update to Grok 4, which already competes with GPT-5 in some benchmarks, such as ARC-AGI 2. GPT-5 is one of the best models for coding, and it ...

There is a common problem for all AI companies for overfitting to benchmarks. XAI Grok 4 has some problems with prompt adherence. XAI could have had overfitting resulted from the reinforcement ...

Is Grok 4.2 the most intelligent coding model we’ve seen yet? With its release in January 2026, this AI powerhouse has already sparked conversations across the tech world. In this comparison, World of ...

A Mathematician with early access to XAI Grok 4.20, found a new Bellman function for one of the problems he had been working on with my student N. Alpay. Not an Erdős problem, but original research.

Artificial Intelligence (AI) is becoming an integral part of daily life, including everyday calculations. But how well do these systems actually handle basic math? And how much should users trust them ...

A grade of 45 might not seem gold star-worthy by old school human exam standards, but that's how xAI's Grok 3 chose to illustrate this column when I interviewed the chatbot on "leaked" rumors that its ...

The Atlantic Daily, a newsletter that guides you through the biggest stories of the day, helps you discover new ideas, and recommends the best in culture. Sign up for it here. Earlier today, Grok ...

On Wednesday night, Elon Musk unveiled xAI’s latest flagship models Grok 4 and Grok 4 Heavy via livestream, just one day after the company’s Grok chatbot began generating outputs that featured ...

I pushed eight free AI chatbots to their limits to find the best AI chatbots of 2026. To explore our top picks, check out ZDNET's chatbot-by-chatbot guide.