Native SDKs
Anthropic SDK
Use Claude Messages through TokenLab with the Anthropic SDK
Overview
The Anthropic SDK can call Claude models through TokenLab's Messages API. Change the API key and base URL; the SDK methods stay the same.
For the Anthropic SDK, use https://api.tokenlab.sh as the base URL, without appending /v1 yourself.
Installation
pip install anthropicConfigure the Client
from anthropic import Anthropic
client = Anthropic(
api_key="sk-your-tokenlab-key",
base_url="https://api.tokenlab.sh",
)Basic Usage
message = client.messages.create(
model="claude-sonnet-5",
max_tokens=1024,
messages=[
{"role": "user", "content": "Reply with: Connected to TokenLab."}
]
)
print(message.content[0].text)Streaming
with client.messages.stream(
model="claude-sonnet-5",
max_tokens=1024,
messages=[{"role": "user", "content": "Write a short poem about coding."}]
) as stream:
for text in stream.text_stream:
print(text, end="", flush=True)Vision
import base64
message = client.messages.create(
model="claude-sonnet-5",
max_tokens=1024,
messages=[{
"role": "user",
"content": [
{"type": "text", "text": "What's in this image?"},
{
"type": "image",
"source": {
"type": "url",
"url": "https://example.com/image.jpg"
}
}
]
}]
)
with open("image.png", "rb") as f:
image_data = base64.b64encode(f.read()).decode()
message = client.messages.create(
model="claude-sonnet-5",
max_tokens=1024,
messages=[{
"role": "user",
"content": [
{"type": "text", "text": "Describe this image"},
{
"type": "image",
"source": {
"type": "base64",
"media_type": "image/png",
"data": image_data
}
}
]
}]
)Tool Use
message = client.messages.create(
model="claude-sonnet-5",
max_tokens=1024,
tools=[{
"name": "get_weather",
"description": "Get the weather for a location",
"input_schema": {
"type": "object",
"properties": {
"location": {"type": "string"}
},
"required": ["location"]
}
}],
messages=[{"role": "user", "content": "What's the weather in Tokyo?"}]
)
for block in message.content:
if block.type == "tool_use":
print(block.name)
print(block.input)Extended Thinking
message = client.messages.create(
model="claude-opus-5",
max_tokens=16000,
thinking={
"type": "enabled",
"budget_tokens": 10000
},
messages=[{"role": "user", "content": "Solve this complex problem step by step."}]
)
for block in message.content:
if block.type == "thinking":
print(block.thinking)
elif block.type == "text":
print(block.text)Choose a Model
Copy a current Claude model ID from the Models page. Compare models on your own prompts before setting a default.