Rohan Paul@rohanpaul_ai · XAI 摘要
Anthropic的Claude Fable 5（7月1日版）回归后在BridgeBench重测中表现大幅下滑：Debugging从86.2暴跌至25.9，Refactoring从73.6降至38.4，Hallucination从75.9滑落至61.7。原因是新安全护栏并非简单拒绝层，而是将标记请求路由至较弱的Opus 4.8，导致大量任务回退。Rohan Paul评论称这标志着普通人可能再也无法获得升级的前沿模型，如今只有“许可智能”。
Feels like an end of era， ordinary people will probably never again get upgraded frontier models.
Fable 5's return shows how safety routing can downgrade a frontier model.
Now we only permissioned intelligence.
The cost of putting a gatekeeper inside intelligence.
To note， that safeguard is not a simple refusal layer； it is a classifier that sends flagged Fable 5 requests to Opus 4.8.
Fable 5 came back， but the old promise did not.
End of an era. ☹️