Claude 3.7 Sonnet Upgrade 🚀

Check out the official announcement about this upgrade on Twitter!

Bolt.new has been upgraded to use Claude 3.7 Sonnet, bringing significant improvements to code generation, reasoning, and overall capabilities. Let’s explore what this means for your development workflow.

Key Improvements

1. Enhanced Code Generation

• More accurate and consistent code output
• Better handling of complex programming patterns
• Improved type inference and TypeScript support
• More reliable dependency management

2. Expanded Context Window

• Larger context window for better project understanding
• More efficient memory utilization
• Improved handling of multiple files
• Better retention of project context

3. Advanced Error Handling

• More precise error detection
• Better suggestions for fixes
• Improved debugging capabilities
• More context-aware error solutions

Real-World Benefits

1. Code Quality

// Before: Basic implementation
function handleData(data: any) {
  return data;
}

// After: Type-safe implementation with error handling
interface DataPayload<T> {
  status: 'success' | 'error';
  data?: T;
  error?: string;
}

function handleData<T>(input: T): DataPayload<T> {
  try {
    return {
      status: 'success',
      data: input
    };
  } catch (error) {
    return {
      status: 'error',
      error: error instanceof Error ? error.message : 'Unknown error'
    };
  }
}

2. Project Structure

• Better organization suggestions
• More maintainable code patterns
• Improved scalability recommendations
• Cleaner architecture proposals

3. Development Speed

• Faster problem resolution
• More accurate first-time solutions
• Reduced iteration cycles
• Better understanding of requirements

Best Practices

1. Clear Communication

❌ "Fix the code"
✅ "Update the user authentication function to handle invalid tokens 
   and add proper TypeScript types for the user object"

2. Provide Context

• Share relevant code snippets
• Explain the desired outcome
• Mention any constraints
• Describe error scenarios

3. Iterative Development

1. Start with basic requirements
2. Add complexity gradually
3. Verify each step
4. Refine as needed

Tips for Success

1. Be Specific

   • Clear requirements
   • Desired outcomes
   • Known constraints
   • Expected behavior

2. Use TypeScript

   • Enable better type inference
   • Improve code quality
   • Enhance maintainability
   • Better error detection

3. Review Solutions

   • Check for best practices
   • Verify type safety
   • Test edge cases
   • Ensure maintainability

Common Patterns

1. Error Handling

async function fetchData<T>(url: string): Promise<Result<T>> {
  try {
    const response = await fetch(url);
    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }
    const data = await response.json();
    return { success: true, data };
  } catch (error) {
    return {
      success: false,
      error: error instanceof Error ? error.message : 'Unknown error'
    };
  }
}

2. Type Safety

// Define clear interfaces
interface User {
  id: string;
  name: string;
  email: string;
  preferences?: UserPreferences;
}

// Use type guards
function isUser(obj: unknown): obj is User {
  return (
    typeof obj === 'object' &&
    obj !== null &&
    'id' in obj &&
    'name' in obj &&
    'email' in obj
  );
}

3. Async Operations

async function processData<T>(
  data: T,
  options?: ProcessOptions
): Promise<ProcessResult<T>> {
  try {
    await validateData(data);
    const processed = await transform(data, options);
    return {
      success: true,
      data: processed
    };
  } catch (error) {
    handleError(error);
    return {
      success: false,
      error: getErrorMessage(error)
    };
  }
}

Remember

• Take advantage of improved type inference
• Use TypeScript for better code quality
• Provide clear requirements
• Test edge cases thoroughly
• Review generated code carefully

Need help maximizing these new capabilities? Check out our Advanced Support options!