anthropics/anthropic-sdk-python
OfficialThe Claude SDK for Python — official library providing access to the Claude API from Python applications.
Anthropic ships SDK updates same-day as new Claude models -- v0.89.0 on April 3, 2026 adds claude-opus-4-6 with 1M tokens. Developers integrate Claude into production Python apps for superior code reasoning over OpenAI; vibe builders hook it as backend for frontends, ditching heavy frameworks like L
Best for
Our Review
Anthropic Python SDK is the official Claude API client from Anthropic -- 3,150 GitHub stars, MIT license, last push April 6, 2026. Pip install anthropic delivers full access to 1M context models faster than competitors.
What Anthropic Python SDK does:
- •Full Claude API access send messages, stream responses, use tools, process vision inputs, and handle files.
- •Async support use AsyncAnthropic for non-blocking calls in asyncio apps.
- •Streaming responses get real-time output with context manager.
- •Type hints TypedDict models cover all parameters for IDE autocomplete.
- •Auto-retry exponential backoff handles transient errors.
- •Custom HTTP set proxies and clients for enterprise setups.
Anthropic ecosystem:
- •LangChain integration plug into LangChain agents, but direct SDK skips overhead.
- •LiteLLM proxy route through unified API gateway with OpenAI compatibility.
- •Vercel AI SDK combine for Next.js apps calling Claude backend.
- •FastAPI servers build production APIs with async Claude endpoints.
Getting started:
Run pip install anthropic. Set client = Anthropic(api_key="your_key"). Call client.messages.create(model="claude-opus-4-6", messages=[{"role": "user", "content": "Hello"}]). Supports Python 3.9+.
Limitations:
Requires paid Anthropic API key -- free tier limits apply. Python-only, no JS or other languages. Version 0.x signals pre-1.0 stability. No built-in caching or batching -- add manually for scale.
Cons
- Requires paid API key with usage costs.
- Python 3.9+ only -- no older versions.
- Depends on Anthropic uptime and rate limits.
- Lacks built-in caching for repeated calls.
Our Verdict
Anthropic Python SDK hits v0.89.0 in April 2026 with claude-opus-4-6 and 1M token support.
Developers pick it for direct Claude calls in production Python apps. Get async streaming and tools without abstraction tax. Beats OpenAI SDK on context length and code tasks.
Vibe builders add Claude backend fast -- pip install plus 10 lines hooks your frontend.
Skip if you avoid Python or prefer local models. Skip if GPT ecosystem lock-in fits better.
Frequently Asked Questions
What is the Anthropic Python SDK and what does it provide?
Anthropic Python SDK is the official client library from Anthropic for Claude API. It provides full access to messages, tools, vision, files, and streaming. Type hints cover all parameters for reliable code.
How do I install and use the Anthropic Python SDK in 2026?
Install with `pip install anthropic` -- works on Python 3.9+ in 2026. Create client: `from anthropic import Anthropic; client = Anthropic(api_key="sk-...")`. Send message: `client.messages.create(model="claude-opus-4-6", max_tokens=1024, messages=[{"role":"user","content":"Hi"}])`.
Anthropic Python SDK vs OpenAI Python SDK -- which should I use?
Both offer async, streaming, and tools with similar ergonomics. Anthropic excels on 1M context and code reasoning via claude-opus-4-6. Choose Anthropic Python SDK when you need longer context or Claude models; choose OpenAI Python SDK when GPT-4o or o3 fits your stack.
Does the Anthropic Python SDK support async and streaming?
Yes, AsyncAnthropic handles asyncio calls. Streaming uses `with client.messages.stream(...) as stream:` for real-time tokens. Both work out of the box with v0.89.0.
What is the latest version of the Anthropic Python SDK?
Latest release is v0.89.0 from April 3, 2026 by Anthropic. It adds claude-opus-4-6 support and 1M token context. Check GitHub for changelog.
What is anthropic-sdk-python?
Anthropic ships SDK updates same-day as new Claude models -- v0.89.0 on April 3, 2026 adds claude-opus-4-6 with 1M tokens. Developers integrate Claude into production Python apps for superior code reasoning over OpenAI; vibe builders hook it as backend for frontends, ditching heavy frameworks like L
What license does anthropic-sdk-python use?
anthropic-sdk-python uses the MIT license.
What are alternatives to anthropic-sdk-python?
Search My AI Guide for similar tools in this category.
Great for: Pro Vibe Builders
Skip if: You need something more beginner-friendly or guided
Open source & community-verified
MIT licensed — free to use in any project, no strings attached. 3,273 developers have starred this, meaning the community has reviewed and trusted it.
Reviewed by My AI Guide for relevance, quality, and active maintenance before listing.
Topics