What changed
No action needed unless you validate responses against a closed schema.
Affects UsageCompletionsResult reachable from 11 operations.
Who is affected
Code that reads OpenAI's UsageCompletionsResult objects, used by 11 OpenAI operations.
Before and after
| Where | Before | After |
|---|---|---|
| UsageCompletionsResult.input_cache_write_12h_tokens | absent | present |
Based on OpenAI’s published API specification. How severity is decided.