Grok 4 is xAI's latest reasoning model with a 256k context window. It supports parallel tool calling, structured outputs, and both image and text inputs. Note that reasoning is not exposed, reasoning cannot be disabled, and the reasoning effort cannot be specified. Pricing increases once the total tokens in a given request is greater than 128k tokens. See more details on the xAI docs(opens in new tab)
Modalities
Context
256K
Released
Jul 9, 2025
Knowledge Cutoff
Jul 2025
Grok 4 is xAI's latest reasoning model with a 256k context window. It supports parallel tool calling, structured outputs, and both image and text inputs. Note that reasoning is not exposed, reasoning cannot be disabled, and the reasoning effort cannot be specified. Pricing increases once the total tokens in a given request is greater than 128k tokens. See more details on the xAI docs
Grok 4 has a 256,000 token context window.
Grok 4 accepts images, text and files such as PDFs as input and returns text.
Grok 4.6, Grok 4.5, Grok Build 0.1 and 3 more are other text models from SpaceXAI.
Grok 4 was released on July 9, 2025. Its knowledge cutoff is July 31, 2025.
Token volume and request traffic to this model over time.