Claude Opus 4.5

Based on the current evidence, I would include Claude Opus 4.5 with a conservative judgment: it has noticeable attention, but it is better treated as a widely discussed model label rather than a clearly documented, fully validated product. Proof of popularity mainly comes from X reposts, Zhihu discussion threads, and prediction-style posts. Those show attention, not usability. Stronger proof such as official docs, technical reports, reproducible tutorials, or sustained hands-on evaluations is limited in the provided sources.