Image URL for multimodal model inputs (OpenAI format).
Represents the inner image_url object in OpenAI's Chat Completion API format. This
is used by ImagePromptTemplate and ChatPromptTemplate.
See Also:
ImageContentBlock: LangChain's provider-agnostic image format used in message
content blocks. Use ImageContentBlock when working with the standardized
message format across different providers.
Note:
The detail field values are not validated locally. Invalid values
will be rejected by the downstream API, allowing new valid values to
be used without requiring a LangChain update.
