xAI: Grok 4

x-ai/grok-4

Created Jul 9, 2025256,000 context

Starting at $3/M input tokensStarting at $15/M output tokens

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

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xAI: Grok 4

x-ai/grok-4

Created Jul 9, 2025256,000 context

Starting at $3/M input tokensStarting at $15/M output tokens

Recent activity on Grok 4

Total usage per day on OpenRouter

Prompt

605M

Reasoning

91.6M

Completion

38.1M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.

xAI: Grok 4 – Recent Activity and Usage Stats | OpenRouter