ImageContentBlock

Type of the content block. Used for discrimination.

Unique identifier for this content block.

Either:

• Generated by the provider
• Generated by LangChain upon creation (UUID4 prefixed with 'lc_'))

Reference to the image in an external file storage system.

For example, OpenAI or Anthropic's Files API.

Index of block in aggregate response. Used during streaming.

URL of the image.

Data as a base64 string.

Provider-specific metadata. This shouldn't be used for the image data itself.