> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nolma.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Anthropic

> Use Claude models through the Nolma gateway

# Anthropic via Nolma

## Setup

```python theme={null}
import anthropic

client = anthropic.Anthropic(
    api_key=os.environ["ANTHROPIC_API_KEY"],
    base_url="https://gateway.nolma.ai/anthropic",
    default_headers={
        "NM-Key": "nm_live_abc123",
        "NM-Agent": "my-agent",
        # Optional:
        "NM-User": "user_123",
        "NM-Env": "production",
    }
)
```

## Supported models

| Model                     | Tier    | Cost (input / output per 1M tokens) |
| ------------------------- | ------- | ----------------------------------- |
| claude-sonnet-4-6         | Premium | $3.00 / $15.00                      |
| claude-haiku-4-5-20251001 | Economy | $0.08 / $0.40                       |

## Streaming

Streaming works exactly as normal:

```python theme={null}
with client.messages.stream(
    model="claude-haiku-4-5-20251001",
    max_tokens=500,
    messages=[{"role": "user", "content": "Tell me a story"}]
) as stream:
    for text in stream.text_stream:
        print(text, end="", flush=True)
```

## Node.js

```typescript theme={null}
import Anthropic from '@anthropic-ai/sdk'

const client = new Anthropic({
  apiKey: process.env.ANTHROPIC_API_KEY,
  baseURL: 'https://gateway.nolma.ai/anthropic',
  defaultHeaders: {
    'NM-Key': 'nm_live_abc123',
    'NM-Agent': 'my-agent',
  }
})
```

## Required headers

The `anthropic-version` header is forwarded automatically. You do not need to add it manually.