Adding Amazon Nova and Claude 3 Models to Aider Chat

aider model metadata.md

Adding Amazon Nova and Claude 3 Models to Aider Chat

If your version of Aider doesn't include support for Amazon Bedrock Nova models or Claude 3 Sonnet, you can add them manually using model metadata configuration. Also see how to use Aider with Bedrock

Nova Models v1 Comparison

Feature	Nova Micro	Nova Lite	Nova Pro
Context Window	128K tokens	300K tokens	300K tokens
Best For	Quick tasks, shorter interactions	General purpose, good balance	Complex tasks, highest quality
Strengths	- Fast response time - Lowest cost - Good for simple tasks	- Larger context window - Better reasoning - Good price/performance ratio	- Best reasoning capabilities - Most precise responses - Advanced coding assistance
Use Cases	- Quick code reviews - Simple queries - Basic documentation	- General development - Documentation writing - Code analysis	- Complex system design - Advanced problem solving - Detailed code generation

Configuration Steps

1. Create a file named .aider.model.metadata.json
2. According to aider documentation. Place the file in one of these locations:
   • Your home directory
   • The root of your git repository
   • The current directory where you run aider
   • Or use the --model-metadata-file <filename> option when launching aider

Model Configuration

Add the following JSON configuration to .aider.model.metadata.json:

{
    "bedrock/us.amazon.nova-micro-v1:0": {
        "max_tokens": 128000,
        "max_input_tokens": 128000,
        "max_output_tokens": 5000,
        "input_cost_per_token": 0.000000035,
        "output_cost_per_token": 0.00000014,
        "litellm_provider": "bedrock",
        "mode": "chat"
    },
    "bedrock/us.amazon.nova-lite-v1:0": {
        "max_tokens": 300000,
        "max_input_tokens": 300000,
        "max_output_tokens": 5000,
        "input_cost_per_token": 0.00000006,
        "output_cost_per_token": 0.000000024,
        "litellm_provider": "bedrock",
        "mode": "chat"
    },
    "bedrock/us.amazon.nova-pro-v1:0": {
        "max_tokens": 300000,
        "max_input_tokens": 300000,
        "max_output_tokens": 5000,
        "input_cost_per_token": 0.0000008,
        "output_cost_per_token": 0.0000032,
        "litellm_provider": "bedrock",
        "mode": "chat"
    },
    "bedrock/us.anthropic.claude-3-7-sonnet-20250219-v1:0": {
        "max_tokens": 128000,
        "max_input_tokens": 128000,
        "max_output_tokens": 5000,
        "input_cost_per_token": 0.000003,
        "output_cost_per_token": 0.000015,
        "litellm_provider": "anthropic",
        "mode": "chat"
    }
}

Example of the .env file

You can test one of the combinations depending of your need.

# model for chat and summary
AIDER_WEAK_MODEL=bedrock/us.amazon.nova-micro-v1:0
#AIDER_WEAK_MODEL=bedrock/us.anthropic.claude-3-5-haiku-20241022-v1:0

# model for coding
AIDER_MODEL=bedrock/us.amazon.nova-pro-v1:0
# AIDER_MODEL=bedrock/us.anthropic.claude-3-7-sonnet-20250219-v1:0