Anthropic Model Connector
The Anthropic Model Connector defines Claude as the LLM provider and default model for your Worker Agents. It supports both direct Anthropic endpoints and AWS Bedrock endpoints.
What you will learn
- Which Claude models the connector supports.
- How to configure authentication, region, and the default model.
- How to override the default model at runtime.
- How the Harness-managed connector offering works if you do not have model access.
Supported models
The following models are available when configuring the connector:
| Model | Description |
|---|---|
| Claude Opus 4.8 | Latest and most capable model for complex reasoning |
| Claude Opus 4.7 | High-capability model for complex reasoning |
| Claude Opus 4.6 | High-capability model for complex reasoning |
| Claude Sonnet 4.6 | Fast, high-capability model for most tasks |
| Claude Sonnet 4.5 | Previous-generation fast model |
| Claude Haiku 4.5 | Lightweight, low-latency model for simple tasks |
Connector configuration
When you create the connector, set the Authentication Type (Personal Token for direct Anthropic, or Amazon Bedrock API Key), the Region, and the default Model Name.
Anthropic Connector setup with authentication type selection and model configuration
Runtime model override
Each Worker Agent uses the default model configured on the connector unless you set the optional Model Name field on the agent. For Anthropic connectors, the Model Name field also accepts an AWS Bedrock inference profile ARN, for example arn:aws:bedrock:us-east-1:123456789012:application-inference-profile/a1b2c3d4e5f6.
Harness-managed connector
If you do not have access to a model provider, Harness offers a managed LLM connector you can use instead.
Until August 2026, usage of the Harness-managed LLM connector is included in your Harness subscription at no additional cost. After August 2026, Harness bills managed LLM connector usage separately, in addition to your Harness subscription.
Related concepts
- Go to Worker Agents to create and configure agents that use this connector.
- Go to OpenAI Model Connector to configure OpenAI as your model provider.