xAI👁️ Vision
xAI: Grok 4 Fast
Grok 4 Fast is xAI's latest multimodal model with SOTA cost-efficiency and a 2M token context window. It comes in two flavors: non-reasoning and reasoning. Read more about the model on xAI's [news post](http://x.ai/news/grok-4-fast). Reasoning can be enabled/disabled using the `reasoning` `enabled` parameter in the API. [Learn more in our docs](https://openrouter.ai/docs/use-cases/reasoning-tokens#controlling-reasoning-tokens)
OpenRouter 원가 (1M 토큰)
입력$0.200
출력$0.500
합계$0.700
인보이스랩 (월 예상)
입력 0.5M + 출력 0.5M 기준
공급가액₩577
부가세 (10%)₩57
결제 금액₩634
💡 부가세 ₩57 매입공제 가능
모델 정보
기본 정보
| 모델 ID | x-ai/grok-4-fast |
| 제공사 | xAI |
| 컨텍스트 윈도우 | 2,000,000 토큰 |
| 모달리티 | text+image->text |
지원 기능
👁️ 이미지 분석⚡ Function Calling📋 Structured Output📄 JSON Mode🌡️ Temperature📏 Max Tokens
API 사용법
Python (OpenAI SDK 호환)
from openai import OpenAI
client = OpenAI(
api_key="your-dream-api-key",
base_url="https://api.invoicedream.co.kr/v1"
)
response = client.chat.completions.create(
model="x-ai/grok-4-fast",
messages=[
{"role": "user", "content": "안녕하세요"}
]
)
print(response.choices[0].message.content)Node.js / TypeScript
import OpenAI from 'openai';
const client = new OpenAI({
apiKey: 'your-dream-api-key',
baseURL: 'https://api.invoicedream.co.kr/v1'
});
const response = await client.chat.completions.create({
model: 'x-ai/grok-4-fast',
messages: [{ role: 'user', content: '안녕하세요' }]
});
console.log(response.choices[0].message.content);cURL
curl https://api.invoicedream.co.kr/v1/chat/completions \
-H "Authorization: Bearer your-dream-api-key" \
-H "Content-Type: application/json" \
-d '{
"model": "x-ai/grok-4-fast",
"messages": [{"role": "user", "content": "안녕하세요"}]
}'💡 Tip: OpenAI SDK를 그대로 사용할 수 있습니다.base_url만 변경하면 됩니다!