anthropic()

Create an Anthropic Claude language model

Factory function to create an Anthropic Claude model instance.

Signature

def anthropic(model_id: str) -> LanguageModel

Parameters

model_id · str · required

The Anthropic model identifier.

Returns

A LanguageModel instance configured for Anthropic.

Environment

Requires ANTHROPIC_API_KEY environment variable.

export ANTHROPIC_API_KEY="sk-ant-..."

Available Models

Model ID	Description
claude-4-5-opus-20251101	Claude 4.5 Opus - most capable
claude-4-5-sonnet-20250929	Claude 4.5 Sonnet - powerful with Thinking mode
claude-4-5-haiku-20251001	Claude 4.5 Haiku - fast and efficient
claude-4-opus-20250514	Claude 4 Opus - high capability
claude-4-sonnet-20250514	Claude 4 Sonnet - balanced
claude-3-5-sonnet-latest	Claude 3.5 Sonnet - reliable
claude-3-5-haiku-latest	Claude 3.5 Haiku - fastest

Example

from ai_query import generate_text
from ai_query.providers import anthropic

result = await generate_text(
    model=anthropic("claude-4-5-sonnet-20250929"),
    prompt="Hello, world!"
)

Provider Options

result = await generate_text(
    model=anthropic("claude-4-5-sonnet-20250929"),
    prompt="Be creative.",
    provider_options={
        "anthropic": {
            "temperature": 0.7,
            "max_tokens": 2000,
            "top_p": 0.9
        }
    }
)