openai-python v3.15.0: agent session, audio-mini, prompt-cache prewarming
openai-python v3.15.0 (2026-09-18) adds agent session model settings, audio-mini model choices, compaction progress events, Responses WebSocket sessions, and prompt-cache prewarming.
What changed
Added agent session model settings, audio-mini model choices, compaction progress events, managed Responses WebSocket sessions, and prompt-cache prewarming; fixed chat stream moderation preservation; clarified SIP call ID usage; updated image examples.
Why it matters
Developers get clearer runtime signals and caching control during integration and debugging, improving observability and testability of apps using openai-python.
Who should care
DevelopersEnterprises
Worth trying
Maybe — Test if you use agent sessions, audio features, or prompt caching.