The Anthropic plugin provides access to Claude models for text generation. Note that it does not support embeddings, so you’ll need a fallback plugin.

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Features

  • Claude 3 models - Access to Claude 3 Opus, Sonnet, and Haiku
  • Long context - Up to 200k tokens context window
  • XML formatting - Optimized for structured responses
  • Safety features - Built-in content moderation

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Installation

elizaos plugins add @elizaos/plugin-anthropic

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Configuration

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Environment Variables

# Required
ANTHROPIC_API_KEY=sk-ant-...

# Optional model configuration
# You can use any available Anthropic model
ANTHROPIC_SMALL_MODEL=claude-3-haiku-20240307      # Default: claude-3-haiku-20240307
ANTHROPIC_LARGE_MODEL=claude-3-5-sonnet-latest     # Default: claude-3-5-sonnet-latest

# Examples of other available models:
# ANTHROPIC_SMALL_MODEL=claude-3-haiku-20240307
# ANTHROPIC_LARGE_MODEL=claude-3-opus-20240229
# ANTHROPIC_LARGE_MODEL=claude-3-5-sonnet-20241022
# ANTHROPIC_LARGE_MODEL=claude-3-5-haiku-20241022

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Character Configuration

{
  "name": "MyAgent",
  "plugins": [
    "@elizaos/plugin-anthropic",
    "@elizaos/plugin-openai"  // For embeddings
  ]
}

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Supported Operations

OperationSupportNotes
TEXT_GENERATION✅All Claude models
EMBEDDING❌Use fallback plugin
OBJECT_GENERATION✅Via XML formatting

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Important: Embedding Fallback

Since Anthropic doesn’t provide embedding models, always include a fallback: 
{
  "plugins": [
    "@elizaos/plugin-anthropic",  // Primary for text
    "@elizaos/plugin-openai"       // Fallback for embeddings
  ]
}

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Model Configuration

The plugin uses two model categories:
  • SMALL_MODEL: For faster, cost-effective responses
  • LARGE_MODEL: For complex reasoning and best quality
You can use any available Claude model, including:
  • Claude 3.5 Sonnet (latest and dated versions)
  • Claude 3 Opus, Sonnet, and Haiku
  • Claude 3.5 Haiku
  • Any new models Anthropic releases

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Usage Tips

  1. XML Templates - Claude excels at XML-formatted responses
  2. System Prompts - Effective for character personality
  3. Context Management - Leverage the 200k token window

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External Resources