Elon Musk's xAI on Monday unveiled its latest flagship model, Grok 3, alongside what appears to be a big price hike for X Premium+ subscriptions.

Grok 3, which Musk has dubbed the "smartest AI on Earth," is first rolling out to Premium+ subscribers of the X app. However, it will soon be available via a "Super Grok" subscription on the Grok app and Grok.com website.

The latest large language model (LLM) from xAI has been trained on 200,000 GPUs and uses more than 10x the computing power of Grok 2. It has advanced reasoning and agentic abilities and beats almost all of its rivals on math, science, and coding benchmarks.

To access Grok 3’s reasoning abilities, users can click on the new “Think” and “Big Brain” buttons. “Think” relies on a smaller Grok 3 mini model and can solve simple queries, whereas “Big Brain” relies on Grok 3 and can be used to solve more complex queries. In a demo, an xAI engineer used Big Brain to create a game that combines Tetris and Bejeweled.

When users drop prompts via Think or Big Brain, Grok 3 and Grok 3 mini will display their “thoughts” on screen. To view their approach to generating a response, users can maximize the processing window. However, not all of Grok's thoughts will be revealed, Musk said. Some of the thoughts will be obscured to stop rival companies from copying it, he added.

On a mathematics benchmark called AIME 2025, Grok 3 and Grok 3 mini outperformed OpenAI’s 03 mini, DeepSeek’s R1, and Google’s Gemini 2 Flash models in reasoning abilities, xAI says.

In addition to reasoning, Grok 3 also brings a new agentic feature called DeepSearch. This feature can be used to conduct a comprehensive analysis and generate a report. When prompted, it opens a new progress bar on the left and displays Grok’s thoughts on the right. The right-hand panel also shows the websites Grok accessed and presents the final output with key citations.

OpenAI, Google, and Perplexity recently released similar agentic research tools; all of them are called "Deep Research."

Some Grok 3 features and models are launching in beta, TechCrunch notes. Voice mode has been pushed by a week since it's "still a little patchy," Musk said in an X post.

Premium+ subscribers should see Grok 3 appear on X. If not, update your app. Those subscribers, however, may be in for a big price hike. As TechCrunch notes, the Premium support page lists a Premium+ subscription at $40 per month, up from $22. On the sign-up page, you can get a 17% discount right now, so a monthly subscription is just under $33.

This is the second hike for the Premium+ tier in three months. In December, X increased the cost by 37.5%. Premium+ is the most expensive plan in X’s subscription model. It offers an ad-free experience, the ability to publish articles, access to all the features of Grok AI, and the highest priority for comments, among other perks.

By: DocMemory
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