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:///docs/use-cases/reasoning-tokens#controlling-reasoning-tokens)
Pricing
💱 匯率 USD/NTD = 32.34 · 不含稅 · 更新於 2026/07/22
Technical specifications
Quick Start
Use Grok 4 Fast via BazaarLink API — just change the base_url:
from openai import OpenAI
client = OpenAI(
base_url="https://bazaarlink.ai/api/v1",
api_key="sk-bl-YOUR_API_KEY",
)
response = client.chat.completions.create(
model="grok-4-fast",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://bazaarlink.ai/api/v1",
apiKey: "sk-bl-YOUR_API_KEY",
});
const response = await client.chat.completions.create({
model: "grok-4-fast",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);Why use Grok 4 Fast via BazaarLink?
- ✓USD billing (TWD-quoted) + unified invoices — no foreign credit card needed for Taiwan teams
- ✓OpenAI-compatible API — zero code changes required
- ✓Automatic failover — multi-provider redundancy for the same model
- ✓Chinese-language support — local team, instant help
Frequently Asked Questions
What is 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:///docs/use-cases/reasoning-tokens#controlling-reasoning-tokens)
How much does the Grok 4 Fast API cost?
Grok 4 Fast costs $0.2000 per 1K input tokens and $0.5000 per 1K output tokens when accessed through BazaarLink.
How do I use Grok 4 Fast with the OpenAI SDK?
Set base_url to "https://bazaarlink.ai/api/v1" and use model ID "grok-4-fast". All OpenAI SDK methods (chat.completions, embeddings, streaming) work without code changes.
What is the context window for Grok 4 Fast?
Grok 4 Fast supports a context window of 2,000,000 tokens.
Is Grok 4 Fast available for free?
Grok 4 Fast is a paid model. BazaarLink offers free trial credits on registration so you can test it without a credit card.