开源模型逼近Fable 5，Opus 5面临困境

The closer open-source models get to Fable 5, the greater the problem becomes for Opus 5. After all, Opus 5 inevitably has to remain below Fable 5, yet stay sufficiently ahead of the open models to still be perceived as a genuine step forward.

That is precisely the dilemma: the better open source becomes, the less room there is for Opus 5 to maneuver. Ultimately, the model is almost bound to disappoint.