AnthropicLanguageModel: Anthropic Language Model Class

In aisdk: Unified Interface for AI Model Providers

Anthropic Language Model Class

Description

Language model implementation for Anthropic's Messages API.

Super class

aisdk::LanguageModelV1 -> AnthropicLanguageModel

Methods

Public methods

• AnthropicLanguageModel$new()

• AnthropicLanguageModel$get_config()

• AnthropicLanguageModel$do_generate()

• AnthropicLanguageModel$do_stream()

• AnthropicLanguageModel$format_tool_result()

• AnthropicLanguageModel$get_history_format()

• AnthropicLanguageModel$clone()

Inherited methods

• aisdk::LanguageModelV1$generate()
• aisdk::LanguageModelV1$has_capability()
• aisdk::LanguageModelV1$stream()

---

Method new()

Initialize the Anthropic language model.

Usage

AnthropicLanguageModel$new(model_id, config, capabilities = list())

Arguments

model_id

The model ID (e.g., "claude-sonnet-4-20250514").

config

Configuration list with api_key, base_url, headers, etc.

capabilities

Optional list of capability flags.

---

Method get_config()

Get the configuration list.

Usage

AnthropicLanguageModel$get_config()

Returns

A list with provider configuration.

---

Method do_generate()

Generate text (non-streaming).

Usage

AnthropicLanguageModel$do_generate(params)

Arguments

params

A list of call options including messages, temperature, etc.

Returns

A GenerateResult object.

---

Method do_stream()

Generate text (streaming).

Usage

AnthropicLanguageModel$do_stream(params, callback)

Arguments

params

A list of call options.

callback

A function called for each chunk: callback(text, done).

Returns

A GenerateResult object.

---

Method format_tool_result()

Format a tool execution result for Anthropic's API.

Usage

AnthropicLanguageModel$format_tool_result(
  tool_call_id,
  tool_name,
  result_content
)

Arguments

tool_call_id

The ID of the tool call (tool_use_id in Anthropic terms).

tool_name

The name of the tool (not used by Anthropic but kept for interface consistency).

result_content

The result content from executing the tool.

Returns

A list formatted as a message for Anthropic's API.

---

Method get_history_format()

Get the message format for Anthropic.

Usage

AnthropicLanguageModel$get_history_format()

---

Method clone()

The objects of this class are cloneable with this method.

Usage

AnthropicLanguageModel$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

aisdk documentation built on May 29, 2026, 9:07 a.m.