Anthropic 发布 Claude Opus 5.5：性能对标 Fable 5.1，成本降四成
原标题：Claude Opus 5.5 matches Fable 5.1 performance at lower cost and promises less "Claudish" writing
AI 摘要
Anthropic 发布新模型家族首款产品 Claude Opus 5.5，宣称在多数任务上达到 Claude Fable 5.1 的水平，但运行成本比 Opus 5 低约 40%，输出速度提升超 30%。该模型定价降至每百万输入 token 4 美元、输出 20 美元，缓存读取费用下降 60%，并首次配备与 Fable 5.1 同级的网络安全、生物和前沿 LLM 开发防护措施。Anthropic 同时宣布将更严格筛查强化学习环境、推出针对蒸馏攻击的限制措施，并支持欧盟 AI 法案合规。
正文节选
Claude Opus 5.5 matches Fable 5.1 performance at lower cost and promises less "Claudish" writing Update – - Added Artificial Analysis benchmark results Anthropic is launching Claude Opus 5.5, the first model in a new family. The company says it delivers Claude Fable 5.1-level performance while costing significantly less and running faster than its predecessor. According to Anthropic, Opus 5.5 matches Claude Fable 5.1 "on most tasks" while costing about 40 percent less to run than Opus 5. Claude