AI Tool Guides
Best for
Safety-focused AI and extended thinking
Works on
Any platform (via code)
Alternatives
Google AI Studio, OpenAI API
Watch out
18+ only; no free tier — requires credit card
What It Does
The programmatic interface to Anthropic's Claude models. It supports text, images, PDFs, tool use (function calling), and extended thinking—where the model shows its chain-of-thought reasoning before answering.
Setup in 5 Minutes
and click Sign up.
Verify your email and phone number.
- Navigate to Settings $$ Billing and add a
payment method to load credit.
- Go to API Keys and click Create Key. Give it
a name, copy the key (format: sk-ant-...), and store it
securely.
- Set the environment variable:
export ANTHROPIC\_API\_KEY="sk-ant-...".
- Install the Python library with pip install anthropic,
then run: import anthropic; client = anthropic.Anthropic();
msg = client.messages.create(model="claude-sonnet-4-20250514",
max\_tokens=1024, messages=[\{"role":"user","content":"Hello"\]);
print(msg.content[0].text)}.
Try This
Use the API to send a prompt with thinking enabled: set
thinking=\{"type":"enabled","budget\_tokens":2000\} and ask
Claude to solve a logic puzzle. Print both the thinking block and the
final answer.
Follow Along
Follow Along — Build a Document Analyser.
that reads a text file using open("notes.txt").read().
- Send the file contents to Claude with the prompt: "Extract the 5 key themes from this document and write a 100-word summary."
- Print the themes and summary to the terminal.
- Test it on a set of class notes or a Wikipedia article saved as a .txt file.
- Extend the script to accept the filename as a command-line argument using sys.argv[1] so you can analyse any file.
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FreeAI Analysis
Frameworks from the aiborg Handbook — powered by Claude