claude

name	claude
description	Anthropic Claude AI models for analysis and coding. Use for AI assistants.

Claude

Claude (by Anthropic) is OpenAI's main competitor. It is famous for its large context window (200k+), low hallucination rates, and "Artifacts" UI.

When to Use

• Coding: Claude 3.5 Sonnet is widely considered the best coding model in 2025.
• Long Context: Analyzing massive PDFs or codebases.
• Safety: Enterprise-grade safety guardrails.

Core Concepts

Models

• Opus: The smartest, largest model.
• Sonnet: The sweet spot. Fast and incredibly capable.
• Haiku: Fast and cheap.

Artifacts

A UI feature (now an API pattern) where the model generates standalone content (React components, SVGs) in a side window.

Computer Use

Claude can interact with a computer GUI (moving mouse, clicking) via API.

Best Practices (2025)

Do:

• Use Sonnet for Dev: It beats GPT-4o in many coding benchmarks.
• Use XML Tags: Claude loves <instructions> and <context> tags in prompts.
• Prefill Responses: Guide Claude by prefilling the {"role": "assistant", "content": "{"} to force JSON.

Don't:

• Don't ignore System Prompts: Claude relies heavily on strong system instructions.

References

• Anthropic Documentation