amazon-bedrock-agentcore-samples/02-use-cases/text-to-python-ide/docs/MODEL_UPDATE_SUMMARY.md

✅ Model Update: Claude Sonnet 3.7 + Nova Premier

🎯 UPDATE COMPLETED

The application has been successfully updated to use the latest and most powerful models with intelligent fallback.

🤖 New Model Hierarchy (Inference Profiles)

1. Primary Model: Claude Sonnet 3.7 (Inference Profile)

• Model ID: us.anthropic.claude-3-7-sonnet-20250219-v1:0
• Type: Inference Profile
• Status: ✅ ACTIVE (Available in us-east-1)
• Performance: Latest and most capable Claude model with optimized inference
• Use Case: Primary model for both code generation and execution

2. Fallback Model: Nova Premier (Inference Profile)

• Model ID: us.amazon.nova-premier-v1:0
• Type: Inference Profile
• Status: ✅ AVAILABLE (Fallback ready)
• Performance: High-performance Amazon model with optimized inference
• Use Case: Automatic fallback if Claude Sonnet 3.7 unavailable

3. Last Resort: Claude 3.5 Sonnet (Standard Model)

• Model ID: anthropic.claude-3-5-sonnet-20241022-v2:0
• Type: Standard Model
• Status: ✅ AVAILABLE (Safety net)
• Performance: Proven reliable model
• Use Case: Final fallback to ensure service availability

🔧 Implementation Details

Intelligent Model Selection

def create_bedrock_model_with_fallback(aws_region: str):
    # 1. Try Claude Sonnet 3.7 (primary)
    # 2. Fall back to Nova Premier
    # 3. Use Claude 3.5 Sonnet as last resort
    # 4. Automatic availability checking
    # 5. Graceful error handling

Features Added

• ✅ Automatic Model Detection: Checks availability before initialization
• ✅ Intelligent Fallback: Seamless transition between models
• ✅ Error Handling: Graceful degradation with informative logging
• ✅ Status Reporting: Health endpoints show current model in use
• ✅ Performance Optimization: Uses best available model automatically

📊 Current Status

Test Results

🎯 Model Fallback Testing
✅ Selected Model: us.anthropic.claude-3-7-sonnet-20250219-v1:0
🎉 Using PRIMARY inference profile: Claude Sonnet 3.7
✅ Agents initialized successfully
🎯 Confirmed: Using inference profile ID

Backend Status

{
  "status": "healthy",
  "current_model": "us.anthropic.claude-3-7-sonnet-20250219-v1:0",
  "architecture": {
    "code_generation": "Strands-Agents Agent (Claude Sonnet 3.7 Inference Profile)",
    "code_execution": "Agentcore Agent (Claude Sonnet 3.7 Inference Profile)"
  }
}

🚀 Benefits

Performance Improvements

• Latest AI Capabilities: Claude Sonnet 3.7 provides state-of-the-art performance
• Better Code Generation: More accurate and efficient Python code
• Enhanced Problem Solving: Superior reasoning and logic capabilities
• Improved Error Handling: Better understanding of edge cases

Reliability Enhancements

• High Availability: Multiple fallback options ensure service continuity
• Automatic Recovery: System adapts to model availability changes
• Zero Downtime: Seamless model switching without service interruption
• Future-Proof: Easy to add new models to the hierarchy

🎯 Usage

The model selection is completely automatic. Users don't need to change anything:

# Start the application - it will automatically use the best available model
./start.sh

Model Information in Responses

• Health endpoint shows current model: /health
• Agent status shows model details: /api/agents/status
• System prompts include model information for transparency

📋 Verification

To verify the model update is working:

# Test model fallback logic
python test_model_fallback.py

# Check current model in use
curl http://localhost:8000/health | jq '.current_model'

# View detailed agent status
curl http://localhost:8000/api/agents/status | jq '.current_model'

✅ Ready for Production

The application now uses:

• 🎯 Claude Sonnet 3.7 for superior AI capabilities
• 🔄 Nova Premier as intelligent fallback
• 🛡️ Claude 3.5 Sonnet as safety net
• 🤖 Real AgentCore for code execution
• 📊 Full monitoring and status reporting

The upgrade is complete and the application is ready for enhanced performance! 🚀