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
In / Out Price
$3 / $15per 1M
Context
256K
Weekly Rank
#181on OpenRouter
Knowledge Cutoff
Jul 31, 2025
Going away May 15, 2026