Poe API

Grok-4-Fast-Reasoning

Grok 4 Fast Reasoning delivers exceptional performance for tasks requiring logical thinking and problem-solving. With a 2M token context window and state-of-the-art cost-efficiency, it handles complex reasoning tasks with accuracy and speed, making advanced AI capabilities accessible to more users.

OFFICIAL

Build with Grok-4-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

See all

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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-fast-reasoning",
    messages = [{
      "role": "user",
      "content": "Write a Python function where given an int array, it returns the length of the longest strictly increasing subsequence. Give the naive solution and an optimal solution."
    }]
)

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

See the full documentation for comprehensive guidance on getting started.