Z.ai debuts GLM-5.3, which uses the same base model as GLM-5.2 with scaled post-training for stronger coding skills, and says it'll release weights in two weeks (Z.ai)

Z.ai has launched GLM-5.3, which utilizes the same foundational model as GLM-5.2. This new version incorporates scaled post-training to enhance its coding and cyber skills. Z.ai also announced plans to release the weights for GLM-5.3 within two weeks. The company previously developed IndexShare for efficient long-context processing and SAO for reinforcement learning on long-horizon tasks with GLM-5.2.