Anthropic API

ELI5 — The Vibe Check

The Anthropic API is how you talk to Claude programmatically. Send a message, get a smart response back. It's known for longer context windows, honest responses, and Claude's tendency to be helpful while admitting uncertainty. The API that powers this very conversation. Very meta.

Real Talk

Anthropic's REST API for accessing Claude models, supporting text generation, tool use (function calling), vision, and streaming responses. It features large context windows (up to 200K+ tokens), system prompts for behavior control, and the Messages API format for structured conversations.

Show Me The Code

import Anthropic from '@anthropic-ai/sdk';

const client = new Anthropic();
const message = await client.messages.create({
  model: 'claude-sonnet-4-20250514',
  max_tokens: 1024,
  messages: [{ role: 'user', content: 'Explain recursion simply.' }]
});

When You'll Hear This

"The Anthropic API handles our document analysis pipeline — Claude processes 200K-token documents in a single call." / "We use Claude's tool use feature via the Anthropic API to let the model call our internal functions."