Anthropic

import os from anthropic import Anthropic client = Anthropic( api_key=os.environ.get("ANTHROPIC_API_KEY"), # This is the default and can be omitted ) message = client.messages.create( max_tokens=1024, messages=[ { "role": "user", "content": "Hello, Claude", } ], model="claude-sonnet-4-5-20250929", ) print(message.content) While you can provide an api_key keyword argument, we recommend using python-dotenv to add ANTHROPIC_API_KEY="my-anthropic-api-key" to your .env file so that your API Key is not stored in source control.

Additional configuration is needed to use Anthropic’s Client SDKs through a partner platform. If you are using Amazon Bedrock, see this guide; if you are using Google Cloud Vertex AI, see this guide; if you are using Microsoft Foundry, see this guide. Python library GitHub repo Requirements: Python 3.8+ Installation:

An Anthropic Console account · An API key · cURL · cURL · Python · Python · TypeScript · TypeScript · Java · Java · Now that you have made your first Claude API request, it's time to explore what else is possible: Working with Messages · Learn common patterns for the Messages API.

The Anthropic Python library provides convenient access to the Anthropic REST API from any Python 3.7+ application.

November 17, 2025 - Python 12.8k 2.1k · Showing 10 of 59 repositories · anthropic-sdk-go Public · Access to Anthropic's safety-first language model APIs via Go · anthropics/anthropic-sdk-go’s past year of commit activity · Go 661 MIT 83 25 11 Updated · Dec 23, 2025 · anthropic-sdk-php Public ·

Anthropic, PBC. ... This python repo provides access to Anthropic's safety-first language model APIs.

To use Anthropic models, you need to install a python package:

This integration connects Sentry with the Anthropic Python SDK.

Requirements: Python 3.8+ Installation: pip install anthropic · TypeScript library GitHub repo · While this library is in TypeScript, it can also be used in JavaScript libraries. Installation: npm install @anthropic-ai/sdk · Java library GitHub repo · Requirements: Java 8 or later ·

Below is an example of using Python ... ... The Anthropic (Claude) API offers a conversational AI that can be leveraged for a variety of applications, ranging from answering questions to generating content or providing customer support...

May 28, 2022 - OpenAI's library was forked from Stripe's. Anthropic's library seems to have been made from scratch.

May 24, 2023 - Anthropic's tokenizer for Claude There's surprisingly little documentation online about the tokenizer of Claude, Anthropic's flagship large language model. Without such information and API support, it's quite hard to count tokens and calculate API cost. So I delved into one of Anthropic's code repositories (anthropic-sdk-python) and figured out how the tokenizer works.

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April 5, 2023 - I will help to get started with the Anthropic API, models available, getting started with the API and few prompt engineering examples.

December 11, 2023 - The Python SDK provides convenient access to Anthropic's powerful conversational AI assistant Claude 2, enabling developers to easily integrate its advanced natural language capabilities into a wide range of applications.

Contribute to anthropics/anthropic-sdk-python development by creating an account on GitHub.