Together AI Tweet Claims GLM-5.3 Beats GPT-5.6 Sol

Together AI posted that GLM-5.3 now beats GPT-5.6 Sol and Claude Fable 5 on agentic benchmarks. The account added that GLM-5.3 Flash ranks just behind it. The post stated the model kept the GLM-5.2 base and improved via scaled post-training using more long-horizon environments, diverse tasks, and additional RL compute. It tagged @zai_org as the source of the work. The packet contains only this single tweet and no further confirmation or details.