xAI Grok 4.1 Fast

x-ai/grok-4.1-fast

Run xAI Grok 4.1 Fast in a hosted Python Task with web search and file inputs.

xAI's best agentic tool calling model via OpenRouter. Features 2 million token context window, exceptional for customer support, research, and complex agentic workflows. Supports reasoning toggle and web search.

Deprecated model

This model is deprecated and not recommended for new projects.

What xAI Grok 4.1 Fast supports in qbash

Web searchSearches the web while it answers.
Image inputReads WEBP, PNG, JPEG and GIF images.
Document inputReads PDF, TEXT, DOC, XLS, RTF and 7 more files.

What is qbash?

qbash is where you build Tasks: Python programs that run a business process on managed infrastructure. Your code runs the steps and calls a model like xAI Grok 4.1 Fast only at the ones that need judgment, with integrations, memory and files available in the same script.

A developer writes the Task once, and anyone on the team runs it from a form, on a schedule, from a webhook or from chat. Each Task is versioned and every run is logged.

How Tasks work

Specifications

Context window: 2Mtokens
Max output: 8,192tokens
Temperature: 0 to 2default 1

Use xAI Grok 4.1 Fast in a Python Task

qbash.ai.raw calls xAI Grok 4.1 Fast from a Task and returns its reply as a string.

main.py
notes = qbash.inputs.get("notes")

summary = qbash.ai.raw(
    f"Summarize these meeting notes in five bullets:\n\n{notes}",
    model="x-ai/grok-4.1-fast",
    system="You are a concise analyst.",
)

qbash.output({"summary": summary})

Model calls in Tasks

Use xAI Grok 4.1 Fast with web search

Turn on Web Search in an inline prompt's model bar and xAI Grok 4.1 Fast searches the web while it answers. Searches are billed at $5.00 per 1,000.

Provider web tools

xAI Grok 4.1 Fast pricing

Input	$0.20 per 1M tokens
Output	$0.50 per 1M tokens
Web search	$5.00 per 1K searches
Input, above 128K input tokens	$0.40 per 1M tokens
Output, above 128K input tokens	$1.00 per 1M tokens

Standard rates in USD.

Supported file formats

Images

WEBP up to 5 MB
PNG up to 5 MB
JPEG up to 5 MB
GIF up to 5 MB

Documents

PDF
TEXT
DOC
XLS
RTF
DOCX
XLSX
PPTX
PPT
ODT
ODP
ODS