Anthropic (Claude)

Anthropic’s Claude models. Often the best pick for nuanced chat, long context, and careful reasoning.

Anthropic’s Claude models are widely considered best-in-class for nuanced conversation, long-context reasoning, and careful following of detailed instructions.

Full walkthrough being written.

When to pick over OpenAI

• Long documents (Claude has very large context windows).
• Nuanced conversational AI.
• Tasks requiring careful instruction-following.

Setup

ANTHROPIC_API_KEY in vly secrets. Use @anthropic-ai/sdk from a Convex action.

import Anthropic from "@anthropic-ai/sdk";
const client = new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY });

const message = await client.messages.create({
  model: "claude-sonnet-4-6",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Hello" }],
});

Models

Model	Use for
claude-opus-4-7	Maximum capability; complex reasoning
claude-sonnet-4-6	Balanced; the default for most use
claude-haiku-4-5	Fast and cheap

Related

OpenAI

Comparison.

AI chatbot recipe

Use case.

Choosing an agent

Anthropic powers Claude Code.