Anthropic Python SDK: install, set base_url, stream, and handle errors

pip install anthropic

import anthropic

client = anthropic.Anthropic(
    api_key="your_key",   # default: ANTHROPIC_API_KEY
    base_url="https://aiprimetech.io",    # default: ANTHROPIC_BASE_URL, else https://api.anthropic.com
)

export ANTHROPIC_API_KEY=your_key
export ANTHROPIC_BASE_URL=https://aiprimetech.io

message = client.messages.create(
    model="claude-sonnet-5",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Summarise TCP slow start in two sentences."}],
)

for block in message.content:
    if block.type == "text":
        print(block.text)

print(message.usage.input_tokens, message.usage.output_tokens)
print(message._request_id)   # log this with any failure report

with client.messages.stream(
    model="claude-sonnet-5",
    max_tokens=16000,
    messages=[{"role": "user", "content": "Write a short story about a lighthouse."}],
) as stream:
    for text in stream.text_stream:
        print(text, end="", flush=True)
    final = stream.get_final_message()

import asyncio, anthropic

client = anthropic.AsyncAnthropic(base_url="https://aiprimetech.io")
limit = asyncio.Semaphore(3)   # stay within your key's concurrency

async def ask(question: str) -> str:
    async with limit:
        msg = await client.messages.create(
            model="claude-haiku-4-5",
            max_tokens=512,
            messages=[{"role": "user", "content": question}],
        )
        return next(b.text for b in msg.content if b.type == "text")

async def main():
    answers = await asyncio.gather(*(ask(q) for q in ["What is DNS?", "What is BGP?"]))
    print(answers)

asyncio.run(main())

client = anthropic.Anthropic(base_url="https://aiprimetech.io", timeout=60.0, max_retries=4)

# override for one call only
client.with_options(timeout=300.0).messages.create(
    model="claude-opus-5-5",
    max_tokens=4000,
    messages=[{"role": "user", "content": "Review this design doc..."}],
)

try:
    message = client.messages.create(model="claude-sonnet-5", max_tokens=1024,
                                      messages=[{"role": "user", "content": "Hi"}])
except anthropic.NotFoundError as e:
    print("Bad model ID or URL:", e.message)
except anthropic.RateLimitError as e:
    print("Rate limited, retry after", e.response.headers.get("retry-after"))
except anthropic.APIStatusError as e:
    print(e.status_code, e.type, e.message)
except anthropic.APIConnectionError:
    print("Network problem")