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Represents a streamed chunk returned when streaming the chat completions API, based on the provided input.
string
required
A unique ID of the chat completion.
string
required
The object type, which is always set to chat.completion.chunk.
string
required
The model to generate the completion. For dedicated endpoints, it returns the endpoint ID.
object[]
required
object | null
integer
required
The Unix timestamp (in seconds) for when the token is sampled.
Last modified on July 8, 2026