Grok 4.1 Fast

Grok 4.1 Fast is xAI's best tool-calling model with a 2M context window. It completes agentic tasks accurately and rapidly without extended thinking, excelling at complex real-world use cases such as customer support and finance.

Context 2M·Max out 30K

Quickstart

import { streamText } from 'ai';
import { createOpenAICompatible } from '@ai-sdk/openai-compatible';

const blackbox = createOpenAICompatible({
  name: 'blackbox',
  apiKey: process.env.BLACKBOX_API_KEY!,
  baseURL: 'https://api.blackbox.ai/v1',
});

const result = streamText({
  model: blackbox('blackboxai/x-ai/grok-4.1-fast-non-reasoning'),
  prompt: 'Why is the sky blue?',
});

for await (const chunk of result.textStream) {
  process.stdout.write(chunk);
}

Specs & pricing

Input $/M: $0.20
Output $/M: $0.50
Context window: 2M
Max output: 30K
Supported parameters: tool-usevisionstreamingweb-search

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Grok 4.3	Text	1M	$1.25
Grok Build 0.1	Text	256K	$1
Blackbox Pro	Text	400K	$1.75
Claude Opus 4.7	Text	1M	$5
Claude Opus 4.6	Text	1M	$5