Dossier
Opus 4.5
Coverage of Opus 4.5 in the Nexus archive.
- VibeThinker: 3B param model that beats Opus 4.5 on reasoning with novel SFT+GRPO
VibeThinker, a 3B parameter model, outperforms Opus 4.5 in reasoning tasks using a novel SFT+GRPO approach. The model was discussed on Hacker News with 10 points and no comments.