{"data":{"id":"90ec579a-1ed3-4dc5-8b91-69c9c80315b1","title":"Jev introduces a new shape of LLM - System One, aka Decision Models","summary":"TypeSafe AI has released Jev, a new type of AI model called a 'System One' or 'decision model' that outputs numerical scores and confidence ratings instead of text. Unlike traditional language models, Jev takes unstructured data as input and returns floating-point numbers representing yes/no answers, category choices, or ratings, making it useful for tasks like spam detection, ranking, and classification at a very low cost.","solution":"N/A -- no mitigation discussed in source.","labels":["industry"],"sourceUrl":"https://simonwillison.net/2026/Sep/21/jev/","publishedAt":"2026-09-21T23:09:20.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"news","affectedPackages":null,"affectedVendors":[],"affectedVendorsRaw":["TypeSafe AI","Jev","OpenAI","GPT-5 Nano"],"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":"2026-09-21T23:09:20.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":null,"aiComponentTargeted":"model","llmSpecific":false,"classifierConfidence":0.72,"researchCategory":null,"atlasIds":null}}