Grok 4.6

Mon, 01 Jan 0001 00:00:00 +0000

Grok 4.6 is xAI’s current generation, released 12 August 2026. Its announcement and model card both attribute it to SpaceXAI rather than to xAI — the company was acquired by SpaceX in February 2026 and renamed in July, and this is the model where the new name appears on the vendor’s own pages.

No architecture is published. No parameter count, no layer count, no expert configuration. Grok-1 in 2024 was the last generation xAI described, and everything since has been a product announcement rather than a technical one.

Grok-1

Mon, 01 Jan 0001 00:00:00 +0000

Grok-1 is the first model xAI shipped, and the only one whose architecture it has ever published. Released 17 March 2024 under Apache 2.0 — code and weights both — it is a 314-billion-parameter mixture of experts, and at the time the largest open-weight model anyone had put out.

It is on this wiki as a worked example rather than as a recommendation. Nothing xAI has released since discloses a parameter count, a layer count or a routing scheme, so Grok-1 is the last look inside the family. And because it is a full frontier-scale mixture of experts with every number published, it is a useful counterpart to GPT-2, which is small and dense and runs on a laptop.

xAI (Grok) on Bitsy Wiki

Grok 4.6

Grok-1