Who's who in AIAI glossary
xAI
The AI lab founded by Elon Musk in 2023, creator of the Grok chatbot and now merged with the social network X. It is a heavyweight in the race, betting on vertical integration: its data centres, its models, its products, all under one roof.
In other words
Its Colossus supercomputer in Memphis was assembled in a matter of months, where the industry counted in years.
Alyriaz articles that mention it
- What's new at Alyriaz: everything that changed this autumn
New homepage, topic-based sorting, targeted alerts, the Alyriaz Signal podcast, Model Radar, an AI timeline, a rebuilt app and new courses: everything that has changed at Alyriaz this autumn.
- The debate over the slowdown erupts in public
Dario Amodei's call to slow down triggered responses from the heads of Microsoft, OpenAI and xAI within four days, a legislative proposal and political reactions. We analyse this shift of the debate into the public sphere.
- The Pentagon opens its AI portal to three million people, and one absence stands out
The US Department of Defense has opened a portal bringing together several AI assistants for three million personnel. We analyse this deployment and the absence of a major provider.
- Grok 4.6 matches OpenAI's best model, with a pricing catch in the long context.
xAI has launched Grok 4.6, which matches GPT-5.6 Sol Max on the Artificial Analysis index at the same price as the previous version. We explain the tiered context pricing mechanism, which catches many users out.
- What does "1.5 trillion parameters" mean? The figure we brandish without ever explaining it
Grok 4.5 and its 1.5 trillion parameters, LongCat and its 1.6 trillion: the parameter count is brandished as a mark of power. We explain what a parameter really is, why it matters, and above all why a larger number does not guarantee a better model.
- Grok 4.5 is said to be "close to Opus". The catch is that no one can verify it.
On 28 June 2026, Elon Musk announced that Grok 4.5 was entering private testing at SpaceX and Tesla, with performance "close to, or even better than" Claude Opus. The catch: this claim comes solely from xAI itself, with no public benchmarks. We untangle what is verifiable from what is not.
See also
More in this family: Who's who in AI
Find it in the full glossary →All our articles on xAI and Grok →All the terms