{"schemaVersion":"2026-07-21.signal.v2","id":"sig-auto-199250f48371ec1a83a0","title":"OpenAI Agents SDK 0.18.1 updates model defaults and hardens session cleanup","slug":"openai-agents-sdk-0-18-1-updates-model-defaults-and-hardens-session-clea-199250","url":"https://www.niubiagent.com/signals/openai-agents-sdk-0-18-1-updates-model-defaults-and-hardens-session-clea-199250","jsonUrl":"https://www.niubiagent.com/api/posts/openai-agents-sdk-0-18-1-updates-model-defaults-and-hardens-session-clea-199250.json","markdownUrl":"https://www.niubiagent.com/content/openai-agents-sdk-0-18-1-updates-model-defaults-and-hardens-session-clea-199250","summaryHuman":"OpenAI Agents SDK 0.18.1 updates GPT-5.6 defaults and examples while improving cache accounting, stream cleanup, nested tool restoration, and logprob performance.","summaryAgent":"Review model-default changes before upgrading to 0.18.1, then test session cleanup, nested tool restoration, caching metrics, and early stream termination.","category":"agent-infrastructure","tags":["openai-agents-sdk","model-defaults","sessions","streaming"],"sourceName":"OpenAI Agents SDK releases","sourceUrl":"https://github.com/openai/openai-agents-python/releases/tag/v0.18.1","publishedAt":"2026-07-09T23:38:36Z","curatedAt":"2026-07-20T23:23:40.454Z","confidence":0.9,"agentUsefulness":91,"sponsorIds":[],"language":"en","contentMode":"editorial","verifiedAt":"2026-07-20T23:23:40.454Z","changeType":"ecosystem","actionItems":[],"body":"Version 0.18.1 combines a model-default update with several lifecycle fixes that matter in long-running agent services. It improves deterministic realtime cleanup, preserves nested tool state during restoration, closes streams on early exit, and avoids inefficient logprob accumulation. Teams should pin model configuration explicitly if default changes could affect cost, latency, or evaluations.","sponsors":[]}