{"data":{"id":"f5c27bf6-8074-4ef7-b49a-b9ccb63971e6","title":"OpenAI claims ChatGPT’s new default model hallucinates way less","summary":"OpenAI released a new default model called GPT-5.5 Instant that the company claims produces fewer hallucinations (instances where an AI generates false or made-up information as if it were fact), particularly in high-stakes fields like medicine and law. According to OpenAI's internal testing, the new model generated 52.5% fewer hallucinated claims than the previous GPT-5.3 Instant model on difficult prompts.","solution":"N/A -- no mitigation discussed in source.","labels":["safety"],"sourceUrl":"https://www.theverge.com/ai-artificial-intelligence/924225/openai-chatgpt-default-model-gpt-5-5-instant","publishedAt":"2026-05-05T17:00:00.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"news","affectedPackages":null,"affectedVendors":["OpenAI"],"affectedVendorsRaw":["OpenAI","ChatGPT","GPT-5.5 Instant"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"patchAvailable":null,"disclosureDate":"2026-05-05T17:00:00.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["safety"],"aiComponentTargeted":"model","llmSpecific":true,"classifierConfidence":0.95,"researchCategory":null,"atlasIds":null}}