Anthropic 改进 Fable 5 生物学安全防护，减少误报
原标题：Aug 7, 2026ProductImproving Fable 5's biology safeguards
AI 摘要
Anthropic 宣布改进其 Claude Fable 5 模型的生物学安全防护措施，通过优化分类器将生物学相关的回退（fallback）事件减少了约 85%，从而减少误报并扩大可协助的生物学任务范围。尽管仍对病毒学、毒理学和分子设计等双重用途请求回退到 Opus 5，但公司正通过可信访问途径致力于缩小这一差距。此举旨在平衡模型在生物学和医学领域的潜在益处与安全风险。
正文节选
Improving Fable 5's biology safeguards We’re making updates to Claude Fable 5’s biology safeguards in a way that substantially reduces false positives. Fable 5 users will now experience many fewer “fallbacks”—where the system switches to a less capable model after they make a biology-related query. In our testing, this update reduced biology-related fallbacks by about 85% across our product surfaces.1 Fable 5 will thus be able to assist with a wider range of biology tasks. In practice, users sho