ContextLengthSource type

Where a context length was resolved from.
KnownContextLengthSource can be used interchangeably with ContextLengthSource, this enum contains the known values that the service supports.

Known values supported by the service

Request: The context length is the sum of the request's workload.tokenBudget.promptTokens and maxOutputTokens.
Default: No token budget was supplied, so the service default context length was used.