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Documentation Index

Fetch the complete documentation index at: https://runcrate.ai/docs/llms.txt

Use this file to discover all available pages before exploring further.

Use anthropic/claude-4-sonnet on Runcrate with the same OpenAI-compatible interface you already know. One API key gives you Claude plus 170+ other models — switch between them by changing a single string. No separate Anthropic account, no separate billing.

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Why use Claude through Runcrate

Direct Anthropic APIRuncrate
API formatAnthropic-specific SDKOpenAI-compatible (drop-in)
Models availableClaude onlyClaude + DeepSeek + Llama + Qwen + 170 more
API keysOne per providerOne key for everything
BillingSeparate per providerSingle credit balance
Switching modelsRewrite integration codeChange one string

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Same code, different base URL

If you already use the OpenAI SDK, switching to Claude on Runcrate is a one-line change: 
curl https://api.runcrate.ai/v1/chat/completions \
  -H "Authorization: Bearer rc_live_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-4-sonnet",
    "messages": [
      {"role": "user", "content": "Compare REST and GraphQL in three sentences."}
    ],
    "max_tokens": 256
  }'

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Switch models without changing code

The real advantage: swap model and the rest of your code stays identical. 
from openai import OpenAI

client = OpenAI(
    base_url="https://api.runcrate.ai/v1",
    api_key="rc_live_YOUR_API_KEY",
)

models = [
    "anthropic/claude-4-sonnet",
    "deepseek-ai/DeepSeek-V4-Pro",
    "meta-llama/Llama-4-Scout-17B-16E-Instruct",
]

for model in models:
    response = client.chat.completions.create(
        model=model,
        messages=[{"role": "user", "content": "What is the capital of France?"}],
        max_tokens=32,
    )
    print(f"{model}: {response.choices[0].message.content}")

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Next steps