# Python

> Working examples with the anthropic and openai packages, including streaming and async.

_Source: https://aiprimetech.io/docs/sdks/python/ · Home > Docs > SDKs_


## Anthropic SDK

```bash
pip install anthropic
```

```python
import os
from anthropic import Anthropic

client = Anthropic(
    api_key=os.environ["CLAUDEAPIKEY"],
    base_url="https://aiprimetech.io",          # no /v1
)

msg = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=1024,
    system="You are a concise assistant.",
    messages=[{"role": "user", "content": "Explain HTTP caching in three sentences."}],
)
print(msg.content[0].text)
print(msg.usage.input_tokens, msg.usage.output_tokens)
```


## Streaming

```python
with client.messages.stream(
    model="claude-sonnet-4-6",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Write a haiku about latency."}],
) as stream:
    for text in stream.text_stream:
        print(text, end="", flush=True)
    final = stream.get_final_message()
print("\n", final.usage.output_tokens, "output tokens")
```


## Async

```python
import asyncio
from anthropic import AsyncAnthropic

client = AsyncAnthropic(api_key="sk-your-key", base_url="https://aiprimetech.io")

async def ask(q):
    m = await client.messages.create(
        model="claude-haiku-4-5", max_tokens=256,
        messages=[{"role": "user", "content": q}],
    )
    return m.content[0].text

async def main():
    sem = asyncio.Semaphore(8)                 # respect rate limits
    async def guarded(q):
        async with sem:
            return await ask(q)
    print(await asyncio.gather(*(guarded(q) for q in ["1+1?", "2+2?", "3+3?"])))

asyncio.run(main())
```


## OpenAI SDK

```python
from openai import OpenAI

client = OpenAI(api_key="sk-your-key", base_url="https://aiprimetech.io/v1")   # with /v1

resp = client.chat.completions.create(
    model="claude-sonnet-4-6",
    messages=[{"role": "user", "content": "Hello"}],
)
print(resp.choices[0].message.content)
```

> Both snippets call the same model at the same price. Use whichever library your project already depends on.

- [Messages API](https://aiprimetech.io/docs/api-reference/messages/) — Field reference
- [Streaming](https://aiprimetech.io/docs/api-reference/streaming/) — Event shapes
- [Best practices](https://aiprimetech.io/docs/guides/best-practices/) — Timeouts and retries


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_ClaudeAPIKey.dev is an independently operated, Anthropic-compatible API gateway. Not affiliated with Anthropic._