xAI: x-AI/Grok-Code-Fast 1

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

Model lab: xAI
Model family: —

Modalitiestext → text

Context window256,000

Maximum output10,000

InputUSD 0.144 / 1M tokens

OutputUSD 1.08 / 1M tokens

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Quickstart

Use your Moduck API Key, set the API base URL to https://api.moduck.ai/v1, and set the model parameter to moduck/xai/grok-code-fast-1.

import os
import requests

base_url = "https://api.moduck.ai/v1"
api_key = os.environ["MODUCK_API_KEY"]
model_id = "moduck/xai/grok-code-fast-1"

response = requests.post(
    f"{base_url}/chat/completions",
    headers={
        "Authorization": f"Bearer {api_key}",
        "Content-Type": "application/json",
    },
    json={
        "model": model_id,
        "messages": [{"role": "user", "content": "Hello!"}],
        "stream": False,
    },
    timeout=60,
)
response.raise_for_status()
print(response.json())

Use the familiar OpenAI-style chat request format to make model integration easier.

x-AI/Grok-Code-Fast 1 API Pricing

Type	Price information
Input	USD 0.144 / 1M tokens
Output	USD 1.08 / 1M tokens

Benchmarks

Intelligence Index · v4.314.1

Coding Index—

Agentic Index—

Performance

Performance trends

Throughput91.0 tok/sCurrent

Time to first token1.3 sCurrent

End-to-end latency7.9 sCurrent

Throughput

Current91.0 tok/s

Window average89.9 tok/s

Time to first token

Current1.3 s

Window average1.4 s

End-to-end latency

Current7.9 s

Window average7.5 s

Tail latency (P99)

Current16.6 s

Window average17.0 s

Prompt cache hit rate

Current31.0%

Window average22.5%

Error rate

Current0.0%

Window average0.1%

Availability

Uptime100%At least one provider responded

Availability100%Requests actually served

Error rate0%Share of failed requests

Served requests, hour by hour

24 hours agoNow

x-AI/Grok-Code-Fast 1 Compare models

Model	Input price	Output price	Context window	Capabilities
x-AI/Grok-Code-Fast 1This page	USD 0.144 / 1M tokens	USD 1.08 / 1M tokens	256,000	Text output · Reasoning · Tool calling
Beam 1.0 501B A23B	USD 0.2 / 1M tokens	USD 0.8 / 1M tokens	1,048,576	Text output · Reasoning · Tool calling
Ling 3.1 Flash	USD 0.06 / 1M tokens	USD 0.176 / 1M tokens	262,144	Text output · Reasoning · Tool calling
Schematron V2 Small	USD 0.04 / 1M tokens	USD 0.184 / 1M tokens	128,000	Text output
Schematron V2 Turbo	USD 0.024 / 1M tokens	USD 0.12 / 1M tokens	128,000	Text output

Model specifications

Input: text
Output: text
Context window: 256,000
Maximum output: 10,000
Release date: 2025-09-02
Attachments: No
Reasoning: Yes
Tool calling: Yes
Structured output: No
Temperature setting: Yes
Open weights: No

Frequently asked questions

What is x-AI/Grok-Code-Fast 1 for?

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

What inputs and outputs does x-AI/Grok-Code-Fast 1 support?

Recorded inputs: text; outputs: text.

How is x-AI/Grok-Code-Fast 1 priced?

The pricing table shows the current recorded Moduck price. For example: Input USD 0.144 / 1M tokens; Output USD 1.08 / 1M tokens. See the pricing table for all units, variants, and conditions.

What specifications are recorded for x-AI/Grok-Code-Fast 1?

Current model records list Context window 256,000 tokens; Maximum output 10,000 tokens.

What model parameter does the Quickstart use?

The example uses moduck/xai/grok-code-fast-1. This is a cataloged Moduck public or reserved ID; check your account’s available models before calling it.

Can I call this model through the Moduck API now?

This page has no verified Moduck API call for this model. A Quickstart example or reserved ID does not establish access; check the models available to your account.