Migrate from Anthropic Console to Railwail

Anthropic's Claude is the gold standard for long-context reasoning, agentic workflows, and instruction following. But the Anthropic Console requires a separate SDK from your OpenAI integration. If your stack already speaks OpenAI Chat Completions, Railwail lets you keep using Claude with zero code refactor — or with even less code than before.

Teams typically migrate when they want to unify Claude and GPT-4o calls under a single SDK.

Sign up at railwail.com, navigate to Dashboard → API Keys, click Create New Key. Sign up with Google to get 10 free credits ($0.10), usable 24 hours after sign-up.

Use the OpenAI SDK

If you want one SDK across all models, replace @anthropic-ai/sdk with the OpenAI client. Railwail accepts Claude model IDs in standard chat.completions calls and handles the schema translation internally.

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.RAILWAIL_API_KEY,
  baseURL: "https://railwail.com/api/v1",
});

const res = await client.chat.completions.create({
  model: "claude-sonnet-4-6",
  messages: [
    { role: "system", content: "You are concise." },
    { role: "user", content: "Hello Claude via OpenAI SDK" },
  ],
});
console.log(res.choices[0].message.content);

cURL

curl https://railwail.com/api/v1/chat/completions \
  -H "Authorization: Bearer $RAILWAIL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4-6",
    "messages": [{"role": "user", "content": "Hello Claude"}],
    "max_tokens": 1024
  }'

Tool use translates correctly. With the OpenAI SDK, Railwail converts between OpenAI's tools/tool_calls schema and Anthropic's tool_use blocks transparently. Streaming SSE events are passed through in the native format of the OpenAI SDK.

• Access to GPT-4o and Gemini through the same key
• Built-in playground to A/B Claude vs other models on real prompts
• Tool use and vision preserved
• Spend caps and per-key isolation for multi-tenant apps

• Create your Railwail account at railwail.com
• Generate an API key in Dashboard → API Keys
• Update one line: base_url
• Browse the Claude models at railwail.com/models?provider=anthropic
• Compare per-token pricing at railwail.com/pricing