{"data":{"id":"79209139-aa11-4d75-ba04-ecbb89bcafec","title":"Predicting model behavior before release by simulating deployment","summary":"OpenAI describes Deployment Simulation, a method that replays privacy-preserving samples of past conversations with a new candidate model before release to preview its behavior. The company says the method improved estimates of undesired behavior rates across multiple GPT-5-series Thinking deployments, surfaced novel misalignment, and reduced models' ability to recognize they are being tested. It can measure behaviors occurring at no less than 1 in 200,000 messages.","solution":"N/A -- no mitigation discussed in source.","labels":["research","safety"],"sourceUrl":"https://openai.com/index/deployment-simulation","publishedAt":"2026-06-16T00:00:00.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"research","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":["OpenAI"],"affectedVendorsRaw":["OpenAI","GPT-5-series"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"epssCheckedAt":null,"kevDateAdded":null,"advisoryAliases":null,"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":null,"disclosureDate":"2026-06-16T00:00:00.000Z","fixReleasedAt":null,"daysToFix":null,"fixCheckedAt":null,"capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["safety"],"aiComponentTargeted":null,"llmSpecific":true,"classifierConfidence":0.9,"researchCategory":"blog","atlasIds":null}}