Poe API

Grok-4.1-Fast-Reasoning

Grok-4.1-Fast-Reasoning is a high-performance version of xAI’s Grok 4.1 Fast, the company’s best agentic tool‑calling model. It works great in real-world use cases like customer support, deep research, and advanced analytical reasoning. Equipped with 2M‑token context window, this model processes vast information seamlessly, delivering coherent, context‑aware, and deeply reasoned insights at exceptional speed.

OFFICIAL

Build with Grok-4.1-Fast-Reasoning using the Poe API

Start by creating an API key, for use with any bot on Poe:

Generate API key

Use it in these apps

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Code samples

Chat Completions API

import openai

client = openai.OpenAI(
    api_key = "YOUR_POE_API_KEY",  # or os.getenv("POE_API_KEY")
    base_url = "https://api.poe.com/v1",
)

chat = client.chat.completions.create(
    model = "grok-4.1-fast-reasoning",
    messages = [{
      "role": "user",
      "content": "Analyze the root causes and subsequent impacts of the Industrial Revolution in Europe"
    }]
)

print(chat.choices[0].message.content)

See the full documentation for comprehensive guidance on getting started.