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    x-ai/grok-4.5

    open_router/x-ai/grok-4.5

    ChatVisionFilesToolsSystem prompt
    Use this model

    Context

    500K

    Max output

    450K

    Input / 1M

    $2.00

    Output / 1M

    $6.00

    Cached / 1M

    $0.30

    Cutoff

    unknown

    About this model

    Grok 4.5, xAI's frontier model for coding, agentic work, and knowledge/STEM tasks, accessed via OpenRouter. Accepts text, images and files (e.g. PDFs) as input.

    Best suited for

    • Coding
    • Agentic workflows
    • STEM and knowledge work

    Built-in tools

    Web search

    Hosted by the gateway — enable them per request without wiring your own endpoint.

    Capabilities

    Vision

    Accepts images alongside text in the same message.

    Files

    Accepts file attachments — PDFs, transcripts, spreadsheets.

    Tools

    Native function calling, so agents can invoke your endpoints.

    System prompt

    Honours a dedicated system role, separate from the user turn.

    Supported parameters

    max_tokensMax Tokens Limit

    Specifies the maximum number of text units (tokens) allowed in a response, limiting its length.

    parallel_tool_calls

    Enables parallel execution of tools, allowing multiple tools to run simultaneously.

    response_type

    Defines the format or type of the generated response.

    stream

    Sends the response in real-time as it's being generated.

    tool_choice

    Decides whether to use tools or just the model for generating responses.

    tools

    Lists tool definitions or capabilities available to the model.

    Use this model

    OpenAI-SDK compatible, with gateway fallback and routing across providers.

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    Pricing & provider details

    Open Router logo

    Open Router

    open_router/x-ai/grok-4.5

    Input · per 1M
    $2.00
    Output · per 1M
    $6.00
    Cached input · per 1M
    $0.30
    Context window
    500,000 tokens
    Max output
    450,000 tokens
    Knowledge cutoff
    unknown
    Auto-router
    Not supported

    Start building today

    Route x-ai/grok-4.5 — and every other model in the catalogue — through one endpoint, with failover built in.

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