Text Generation Model

Grok 4.5

Grok 4.5 is a text generation model from X.ai featuring a 500,000-token context window and configurable reasoning effort.

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Publisher

X.ai

TypeText

Context Window500,000 tokens

ReleasedJuly 2026

Input$2.00/MTok

Output$6.00/MTok

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About Grok 4.5

Long-context text generation from X.ai

Grok 4.5 is a large language model developed by X.ai, the AI division associated with X (formerly Twitter). It is designed for text generation tasks and supports a context window of 500,000 tokens, allowing it to process and reason over very long documents or conversation histories in a single pass. The model exposes a configurable reasoning effort setting, giving developers control over the depth of reasoning applied at inference time.

Grok 4.5 is well suited for tasks that require handling large volumes of text, such as document analysis, long-form drafting, summarization, and multi-turn dialogue over extended contexts. Its reasoning effort input allows users to balance thoroughness against latency depending on the requirements of their application. The model became available on MindStudio in July 2026 and can be used without managing separate API credentials through the platform.

Capabilities

What Grok 4.5 supports

Long Context Window

Processes up to 500,000 tokens in a single request, enabling analysis of lengthy documents, codebases, or extended conversation histories without truncation.

Configurable Reasoning

Exposes a reasoning effort selector that lets developers adjust how deeply the model reasons before responding, trading off latency against thoroughness.

Long-Form Text Generation

Supports a maximum response size of 2,000,000 tokens, making it suitable for generating extended documents, reports, or structured outputs in a single call.

Multi-Turn Dialogue

Handles extended multi-turn conversations by retaining context across a 500,000-token window, reducing the need to re-summarize prior exchanges.

Document Analysis

Ingests and reasons over large documents or collections of text within a single context, useful for summarization, extraction, and question-answering tasks.

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FAQ

Common questions about Grok 4.5

What is the context window size for Grok 4.5?

Grok 4.5 supports a context window of 500,000 tokens, meaning it can process up to that many tokens of combined input and conversation history in a single request.

What is the maximum response size Grok 4.5 can produce?

The model supports a maximum response size of 2,000,000 tokens, allowing for very long generated outputs in a single call.

What does the Reasoning Effort setting do?

Reasoning Effort is a configurable input that controls how much deliberation the model applies before generating a response. Adjusting it lets developers balance response quality against inference latency.

What is the pricing for Grok 4.5 on MindStudio?

Pricing information for Grok 4.5 has not been published in the available metadata. Check the MindStudio platform or X.ai's official channels for current pricing details.

What is the knowledge cutoff date for Grok 4.5?

A specific knowledge cutoff date is not included in the available metadata for Grok 4.5. Refer to X.ai's official documentation for that information.

Does Grok 4.5 support image or video inputs?

Based on the available metadata, image and video analysis support is not confirmed for Grok 4.5. The model's listed input types are text and the reasoning effort selector.

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