How much does Grok 3 Fast cost?

Grok 3 Fast is billed pay-as-you-go at $4.74 per 1M input tokens and $23.70 per 1M output tokens. There is no subscription — you only pay for what you use.

What can Grok 3 Fast do?

Grok 3 Fast is xAI's chat model, accessible through the Api.Airforce API.

Is Grok 3 Fast free to use?

Grok 3 Fast is a paid, pay-as-you-go model — no subscription, you are only charged for usage.

How do I use Grok 3 Fast via the API?

Grok 3 Fast is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID grok-3-fast with your Api.Airforce API key.

Who makes Grok 3 Fast?

Grok 3 Fast is xAI's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

xAIPaidOperational

Grok 3 Fast

API model name: grok-3-fast

Grok 3 Fast is xAI's chat model, served on the Api.Airforce unified API. It is priced at $4.74 per million input tokens and $23.70 per million output tokens. That is below the provider's $5.00 official input rate. Access it through the OpenAI-compatible API with one key, alongside 100+ other models on Api.Airforce.

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Pricing

Input / 1M tokens

$4.74

Output / 1M tokens

$23.70

Cache read / 1M tokens

$0.78

Official input rate

$5.00

Official output rate

$25.00

Api.Airforce price vs. the provider's official rate.-5%

Specifications

Provider: xAI
Type: chat model

What is Grok 3 Fast used for?

Chatbots & assistants — conversational AI, drafting, summarizing and Q&A.

Grok 3 Fast vs. similar models

Model	Intelligence	Context	Input / 1M	Output / 1M
Grok 3 Fast	—	—	$4.74	$23.70
Grok 2 Vision	—	—	$2.10	$10.50
Grok 3	18.6	—	$0.66	$3.30
Grok 3 Deepersearch	—	—	$0.57	$2.89

Prices are Api.Airforce pay-as-you-go rates per 1M tokens. Context is the maximum input length.

Grok 3 Fast — frequently asked questions

How much does Grok 3 Fast cost?: Grok 3 Fast is billed pay-as-you-go at $4.74 per 1M input tokens and $23.70 per 1M output tokens. There is no subscription — you only pay for what you use.
What can Grok 3 Fast do?: Grok 3 Fast is xAI's chat model, accessible through the Api.Airforce API.
Is Grok 3 Fast free to use?: Grok 3 Fast is a paid, pay-as-you-go model — no subscription, you are only charged for usage.
How do I use Grok 3 Fast via the API?: Grok 3 Fast is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID grok-3-fast with your Api.Airforce API key.
Who makes Grok 3 Fast?: Grok 3 Fast is xAI's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

All models·Quickstart·Chat API reference

Use Grok 3 Fast via the API

OpenAI-compatible — point any OpenAI SDK at https://api.airforce/v1 and pass grok-3-fast as the model.

cURL

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer $AIRFORCE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "grok-3-fast",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

Python

from openai import OpenAI
client = OpenAI(base_url="https://api.airforce/v1", api_key="$AIRFORCE_API_KEY")
r = client.chat.completions.create(
    model="grok-3-fast",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(r.choices[0].message.content)

JavaScript

import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://api.airforce/v1", apiKey: process.env.AIRFORCE_API_KEY });
const r = await client.chat.completions.create({
  model: "grok-3-fast",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(r.choices[0].message.content);