x-AI/Grok-Code-Fast 1

xAIMCP Tool CallReasoning

xai/grok-code-fast-1Closed API

Fast Grok model for responsive chat, reasoning, and tool-assisted work

Benchmark Pricing$0.20 / 1M in$1.50 / 1M out$0.02 cache read

Context: 256,000 tokens•Max Output: 10,000 tokens•Released: 2025-09-02

TECHNICAL SPECIFICATIONS

Context Window256,000256K tokens

Max Output10,00010K tokens

LicenseProprietaryCloud API only

Input Modalities

Text

Function / Tool CallingSupported (MCP Ready)

Structured OutputsGuaranteed Schema

MODEL CONTEXT PROTOCOL (MCP) READINESS

✓ x-AI/Grok-Code-Fast 1 natively supports OpenAI / Anthropic format tool calling and is fully compatible with MCP servers and agent loops.

MCP Context Window Recommendations

With a context capacity of 256,000 tokens, this model can handle moderately large MCP tool definitions and multi-turn conversation logs comfortably.

API CALL INVOCATION EXAMPLE

// Example: Calling x-AI/Grok-Code-Fast 1 via OpenAI SDK
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.XAI_API_KEY,
});

const response = await client.chat.completions.create({
  model: "xai/grok-code-fast-1",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

console.log(response.choices[0].message.content);