{"data":{"id":"0f41fcb1-7f10-4c73-a060-fe633ab7290c","title":"Claude Fable relaunch disappoints users with nerfed performance","summary":"Claude Fable, a powerful AI model, was relaunched after a government ban was lifted, but users report it performs worse than before due to overly strict safety guardrails (automated rules that prevent certain outputs). The model frequently switches to a weaker alternative (Opus 4.8) even on tasks that don't seem risky, and it blocks requests containing security-related language, making it less useful for many coding tasks.","solution":"N/A -- no mitigation discussed in source. (The source notes that Anthropic 'hasn't acknowledged the reports of false positives yet, but it's likely the company is aware of the problem and will address it in a future update,' but no specific fix, patch, or version update is explicitly mentioned.)","labels":["safety"],"sourceUrl":"https://www.bleepingcomputer.com/news/artificial-intelligence/claude-fable-relaunch-disappoints-users-with-nerfed-performance/","publishedAt":"2026-07-03T00:48:30.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"news","affectedPackages":null,"affectedVendors":["Anthropic"],"affectedVendorsRaw":["Anthropic","Claude Fable","Claude Code","Opus 4.8"],"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":"2026-07-03T00:48:30.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["safety"],"aiComponentTargeted":"model","llmSpecific":true,"classifierConfidence":0.85,"researchCategory":null,"atlasIds":null}}