Anthropic developed Claude with Constitutional AI—training to be helpful while avoiding harm.
Getting Started
Access Claude at claude.ai (free tier) or via API. Free tier offers Claude 3.5 Sonnet. Pro ($20/mo) adds higher limits and all models.
Model Tiers
Claude 3.5 Sonnet—Best balance of speed and capability. Default for most users.
Claude 3 Opus—Most capable for complex reasoning.
Claude 3 Haiku—Fastest and cheapest for simple tasks.
Prompting Tips
Be Conversational
Claude responds well to natural language. No rigid formatting needed.
Explain Your Goals
Context about why produces better results than just what.
Use Artifacts
Ask for "artifacts" to get standalone code/docs you can iterate on.
Claude Excels At
Long-form writing: Maintains coherence over lengthy pieces.
Code review: Thoughtful analysis and clear explanations.
Nuanced discussions: Handles sensitive topics thoughtfully.
Try our Prompt Optimizer to improve your Claude prompts.