Anthropic Models

Anthropic creates the Claude family of AI models, known for thoughtful, nuanced responses and excellent writing quality. Claude models are particularly good at understanding context and producing natural-sounding text.

Available Models

Claude 4 Opus

Anthropic's most capable model.

When to use: Important writing tasks, analyzing long documents, complex research, creative projects.

Claude 4 Sonnet

The sweet spot of capability and speed.

When to use: Daily tasks, professional writing, code review, explanations.

Claude Haiku

Fast and efficient for simple tasks.

When to use: Quick questions, summaries, simple edits, high-volume tasks.

Claude 3.5 Sonnet

Previous generation, still excellent.

When to use: If you prefer the 3.5 style or have specific compatibility needs.

Claude's Strengths

Excellent Writing

Claude models produce natural, human-like text. They're particularly good at:

• Matching your tone and style
• Writing with appropriate nuance
• Avoiding robotic or generic phrases
• Creating engaging content

Long Context Window

With 200K tokens of context, Claude can:

• Read and analyze entire books
• Process very long documents
• Remember more of your conversation
• Handle complex, multi-part requests

Thoughtful Responses

Claude tends to:

• Consider multiple perspectives
• Acknowledge uncertainty appropriately
• Provide balanced viewpoints
• Explain its reasoning

Strong Coding Abilities

Claude 4 Sonnet and Opus are excellent at:

• Writing clean, well-documented code
• Explaining complex code
• Debugging and finding issues
• Code review and suggestions

Choosing Between Claude Models

Claude 4 Features

Thinking Mode

Claude 4 models can show their reasoning process. When you ask complex questions, you may see:

1. Thinking - Claude's internal reasoning
2. Analysis - Working through the problem
3. Response - The final answer

This is automatic for complex queries. You can also request it: "Think through this step by step."

Vision Capabilities

Claude 4 Sonnet and Opus can analyze images:

• Read text in images
• Describe visual content
• Analyze charts and graphs
• Provide feedback on designs

Upload an image with your message to use this feature.

Practical Examples

Writing a Business Email

Prompt: "Write a professional email to decline a meeting invitation.
I have a conflicting appointment but want to suggest an alternative time."

Best model: Claude 4 Sonnet

Claude will produce a polished, professional email that declines gracefully while maintaining the relationship.

Analyzing a Document

Prompt: "I'm uploading a 50-page research paper. Summarize the key
findings, methodology, and limitations."

Best model: Claude 4 Opus

Opus handles long documents well and provides nuanced, comprehensive summaries.

Quick Fact Check

Prompt: "What year was the Eiffel Tower completed?"

Best model: Claude Haiku

For simple factual questions, Haiku is fast and efficient.

Claude vs. GPT

Bottom line: Both are excellent. Try both and see which style you prefer.

Using Your Own API Key

If you have an Anthropic API key:

With your own key:

• You're billed directly by Anthropic
• No Billix credit limits apply
• Full API access and pricing

Common Questions

Next Steps

• Explore Google models (Gemini)
• Compare with OpenAI models
• Learn about model settings