Language models

Base class for chat models.

Base abstract message class.

Messages are the inputs and outputs of a chat model.

Examples include HumanMessage, AIMessage, and

Message chunk, which can be concatenated with other Message chunks.

Generic fake chat model that can be used to test the chat model interface.

• Chat model should be usable in both sync and async tests
• Invokes on_llm_new_token to allow for testing of callback rel

Generic fake chat model that can be used to test the chat model interface.

• Chat model should be usable in both sync and async tests

Abstract base class for interfacing with language models.

All language model wrappers inherited from BaseLanguageModel.

LangSmith parameters for tracing.

Input to a language model.

Output from a language model.

Input/output interface for a language model.