Uses of Annotation Interface
dev.langchain4j.Experimental

Packages that use Experimental

Package	Description
dev.langchain4j.agent.tool
dev.langchain4j.data.message
dev.langchain4j.model.audio
dev.langchain4j.model.chat.response

Packages with annotations of type Experimental

Package	Description
dev.langchain4j.observability.api
dev.langchain4j.observability.api.event
dev.langchain4j.observability.event
dev.langchain4j.guardrail
dev.langchain4j.observability.api.listener

Uses of Experimental in dev.langchain4j.agent.tool

Classes in dev.langchain4j.agent.tool with annotations of type Experimental

Modifier and Type	Class	Description
enum	ReturnBehavior	Defines the behavior of a tool's return value when called by a language model.

Uses of Experimental in dev.langchain4j.data.message

Methods in dev.langchain4j.data.message with annotations of type Experimental

Modifier and Type	Method	Description
<T> T	AiMessage.attribute(String key, Class<T> type)	Returns additional attribute by it's key.
Map<String,Object>	AiMessage.attributes()	Returns additional attributes, typically provider-specific.
AiMessage.Builder	AiMessage.Builder.attributes(Map<String,Object> attributes)
AiMessage.Builder	AiMessage.Builder.thinking(String thinking)
String	AiMessage.thinking()	Get the thinking/reasoning text of the message.

Uses of Experimental in dev.langchain4j.model.audio

Classes in dev.langchain4j.model.audio with annotations of type Experimental

Modifier and Type	Interface	Description
interface	AudioTranscriptionModel	A model that can transcribe audio into text.
class	AudioTranscriptionRequest	Request to transcribe audio.
class	AudioTranscriptionResponse	Response containing the transcription of an audio file.

Uses of Experimental in dev.langchain4j.model.chat.response

Classes in dev.langchain4j.model.chat.response with annotations of type Experimental

Modifier and Type	Class	Description
class	CompleteToolCall	Represents a complete tool call.
class	PartialThinking
class	PartialToolCall	Represents a partial tool call.

Methods in dev.langchain4j.model.chat.response with annotations of type Experimental

Modifier and Type	Method	Description
default void	StreamingChatResponseHandler.onCompleteToolCall(CompleteToolCall completeToolCall)	Invoked when the model has finished streaming a single tool call.
default void	StreamingChatResponseHandler.onPartialThinking(PartialThinking partialThinking)	Invoked each time the model generates a partial thinking/reasoning text, usually a single token.
default void	StreamingChatResponseHandler.onPartialToolCall(PartialToolCall partialToolCall)	This callback is invoked each time the model generates a partial tool call, which contains a single token of the tool's arguments.