How to Create a Custom GPT with Claude Sonnet 4
Learn how to create, launch, and monetize a Claude Sonnet 4 bot with CalStudio
Why Claude Sonnet 4?
Anthropic's Claude Sonnet 4 is a powerful new addition offering an impressive balance of speed and capability with its 200K context window and dual-mode operation.
200K Context Window
Process massive amounts of text and maintain context across long conversations.
Dual-Mode Operation
Rapid responses for simple tasks and extended thinking for complex reasoning.
64K Output Tokens
Generate comprehensive responses and detailed content with extended output capacity.
Perfect for Custom AI Apps: Claude Sonnet 4's versatility makes it ideal for creating custom AI applications that require both quick responses and deep reasoning capabilities.
Step-by-Step Creation Guide
Follow these simple steps to create your Claude Sonnet 4 custom GPT
Sign up on CalStudio.com
Visit CalStudio.com and create your free account to access the Claude Sonnet 4 platform.

Click "Create App"
Once signed up, navigate to your dashboard and click the "Create App" button to start building your custom GPT.

Select Claude
From the model selection menu, choose "Claude" to access Anthropic's powerful language models including Claude Sonnet 4.

Configure App Details
Fill out the form with your app's basic information:
- Name: Choose a memorable name for your custom GPT
- Image: Upload a profile picture or avatar for your app
Set Up AI Behavior
Configure your Claude Sonnet 4 bot's personality and capabilities:
- Description: Write a clear description of your bot's purpose
- Prompt: Define the bot's personality, tone, and behavior
- Design: Select from available themes and layouts
Configure Monetization (Optional)
Set up monetization for your Claude Sonnet 4 custom GPT:
- Offer free trial chats to new users (e.g., 30 free chats)
- Set pricing for additional usage (e.g., $10 for 10 chats)
- Configure subscription models and payment terms
Monetization Tip: Start with a generous free tier to attract users, then charge for premium features or extended usage.
Create and Launch
Click "Create app" to build your custom GPT. It will appear on your dashboard where you can test and launch it. Once ready, share the link with your audience!
Success! Your Claude Sonnet 4 custom GPT is now ready to deploy and share with the world.

Example: Custom Claude Sonnet 4 app deployed at a custom domain
Claude Sonnet 4 vs Other Models
See how Claude Sonnet 4 compares to other AI models
Feature | Claude Sonnet 4 | GPT-4 | Claude 3.5 Sonnet |
---|---|---|---|
Context Window | 200K tokens | 128K tokens | 200K tokens |
Output Tokens | 64K tokens | 4K tokens | 8K tokens |
Dual-Mode Operation | ✓ Yes | ✗ No | ✗ No |
Speed vs Quality Balance | Optimal | Good | Fast |
Complex Reasoning | Excellent | Excellent | Very Good |
Perfect Use Cases for Claude Sonnet 4
Leverage Claude Sonnet 4's unique capabilities for various applications
Content Creation
Generate long-form articles, reports, and comprehensive content with the 64K output token limit.
Code Analysis
Analyze large codebases and provide detailed explanations with the 200K context window.
Document Processing
Process and analyze lengthy documents, contracts, and research papers with high accuracy.
Customer Support
Create intelligent support bots that can handle complex queries and provide detailed responses.
Educational Tools
Build comprehensive tutoring systems and educational assistants with deep subject knowledge.
Research Assistant
Conduct thorough research and analysis with the ability to process vast amounts of information.
Ready to Create Your Claude Sonnet 4 Custom GPT?
The combination of Sonnet 4's capabilities with CalStudio's platform features offers a powerful solution for building cool, custom AI apps! 🚀
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