Class AnthropicChatModel

java.lang.Object

dev.langchain4j.model.anthropic.AnthropicChatModel

All Implemented Interfaces:

ChatModel

public class AnthropicChatModel
extends Object
implements ChatModel

Represents an Anthropic language model with a Messages (chat) API.
More details are available here.

It supports tools. See more information here.

It supports Images as inputs. UserMessages can contain one or multiple ImageContents. Images must not be represented as URLs; they should be Base64-encoded strings and include a mimeType.

The content of SystemMessages is sent using the "system" parameter.

Supports caching SystemMessages and ToolSpecifications.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AnthropicChatModel.AnthropicChatModelBuilder

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ANTHROPIC_VERSION

Constructor Summary

Constructors

Constructor	Description
AnthropicChatModel(AnthropicChatModel.AnthropicChatModelBuilder builder)

Method Summary

Modifier and Type	Method	Description
static AnthropicChatModel.AnthropicChatModelBuilder	builder()
AnthropicChatRequestParameters	defaultRequestParameters()
ChatResponse	doChat(ChatRequest chatRequest)
CompletableFuture<ChatResponse>	doChatAsync(ChatRequest chatRequest)	SPI hook for a genuinely non-blocking chat implementation, invoked by ChatModel.chatAsync(ChatRequest).
List<ChatModelListener>	listeners()
ModelProvider	provider()
Set<Capability>	supportedCapabilities()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface ChatModel

chat, chat, chat, chat, chat, chatAsync, chatAsync, chatAsync, chatAsync, chatAsync

Field Details

ANTHROPIC_VERSION

public static final String ANTHROPIC_VERSION

See Also:

• Constant Field Values

Constructor Details

AnthropicChatModel

public AnthropicChatModel(AnthropicChatModel.AnthropicChatModelBuilder builder)

Method Details

builder

public static AnthropicChatModel.AnthropicChatModelBuilder builder()

doChat

public ChatResponse doChat(ChatRequest chatRequest)

Specified by:

doChat in interface ChatModel

doChatAsync

public CompletableFuture<ChatResponse> doChatAsync(ChatRequest chatRequest)

Description copied from interface: ChatModel

SPI hook for a genuinely non-blocking chat implementation, invoked by ChatModel.chatAsync(ChatRequest).

The default returns a failed future carrying AsyncNotSupportedException to signal that this model has no native asynchronous implementation. Callers on the asynchronous and reactive path (for example the non-blocking RAG stages) detect this and either offload the blocking ChatModel.doChat(ChatRequest) or fail loudly with an actionable message. A model backed by remote HTTP I/O overrides this with a genuinely asynchronous call (no thread parked).

Specified by:

doChatAsync in interface ChatModel

Parameters:

chatRequest - a ChatRequest, containing all the inputs to the LLM

Returns:

a CompletableFuture of the ChatResponse

listeners

public List<ChatModelListener> listeners()

Specified by:

listeners in interface ChatModel

provider

public ModelProvider provider()

Specified by:

provider in interface ChatModel

defaultRequestParameters

public AnthropicChatRequestParameters defaultRequestParameters()

Specified by:

defaultRequestParameters in interface ChatModel

supportedCapabilities

public Set<Capability> supportedCapabilities()

Specified by:

supportedCapabilities in interface ChatModel