Grok 4 Fast (Reasoning)

xai/grok-4-fast-reasoning

xai

Grok 4 with step-by-step reasoning. 2M context for complex analysis

Code Examples

from blockrun_llm import LLMClient

client = LLMClient()  # Uses BLOCKRUN_WALLET_KEY (never sent to server)
response = client.chat("xai/grok-4-fast-reasoning", "Hello!")

Pricing

Input$0.20 / 1M tokens

Output$0.50 / 1M tokens

Context2M tokens

Max Output16K tokens

5% markup on official xai API prices.

Payment

Network

Base

Currency

USDC

Protocol

x402

Pay per request with USDC on Base. No subscription required.

Try It

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