Anthropic¶

Anthropic is an AI safety and research company focused on building reliable, interpretable, and steerable AI systems. Included in their offerings is the Claude AI family of models, which are known for their conversational abilities, careful reasoning, and capacity to follow complex instructions. The Strands Agents SDK implements an Anthropic provider, allowing users to run agents against Claude models directly.

Installation¶

Anthropic is configured as an optional dependency in Strands. To install, run:

pip install strands-agents[anthropic]

Usage¶

After installing anthropic, you can import and initialize Strands' Anthropic provider as follows:

from strands import Agent
from strands.models.anthropic import AnthropicModel
from strands_tools import calculator

model = AnthropicModel(
    client_args={
        "api_key": "<KEY>",
    },
    # **model_config
    max_tokens=1028,
    model_id="claude-3-7-sonnet-20250219",
    params={
        "temperature": 0.7,
    }
)

agent = Agent(model=model, tools=[calculator])
response = agent("What is 2+2")
print(response)

Configuration¶

Client Configuration¶

The client_args configure the underlying Anthropic client. For a complete list of available arguments, please refer to the Anthropic docs.

Model Configuration¶

The model_config configures the underlying model selected for inference. The supported configurations are:

Parameter	Description	Example	Options
`max_tokens`	Maximum number of tokens to generate before stopping	`1028`	reference
`model_id`	ID of a model to use	`claude-3-7-sonnet-20250219`	reference
`params`	Model specific parameters	`{"max_tokens": 1000, "temperature": 0.7}`	reference

Troubleshooting¶

Module Not Found¶

If you encounter the error ModuleNotFoundError: No module named 'anthropic', this means you haven't installed the anthropic dependency in your environment. To fix, run pip install strands-agents[anthropic].