Z.AI confirmed on Wednesday that the Ox Alpha model is a new iteration of its GLM series. The company stated it will release the model's weights later that night, responding to queries by Bloomberg News.
Z.AI confirms Ox Alpha is a new GLM series model and will release weights
Z.ai releases GLM-5.3 with extended post-training
Z.ai announced GLM-5.3, a new model that achieves frontier performance on agentic coding benchmarks by extending the post-training of its GLM-5.2 base model. The ~750B parameter model currently surpasses Kimi K3 and matches or exceeds Claude Fable 5 and GPT-5.6-Sol on various benchmarks.
Kimi K3, DeepSeek V4 Pro, and GLM-5.2 compared on benchmarks, license, and serving cost
A comparison of three open-weight sparse Mixture-of-Experts models—Moonshot AI's Kimi K3, DeepSeek V4 Pro, and Zhipu AI's GLM-5.2—evaluates their capabilities, licensing terms, and serving costs for long-horizon coding and agent workloads.
GLM-5.2 Is the New Best Open Model
GLM-5.2 achieves benchmark scores near frontier levels, matching Opus 4.7 in text-only tasks and ranking among the top open models on multiple tests. It is the strongest open model currently available, outperforming predecessors and rivals like GPT-5.5 and Fable, though it falls short on specialized benchmarks like anti-sycophancy and has limited vision capabilities.
GLM-5.2 is the new leading open weights model on the Artificial Analysis Intelligence Index
GLM-5.2 has been designated as the leading open weights model on the Artificial Analysis Intelligence Index. This recognition reflects its performance and capabilities within the open-source AI model landscape.
GLM 5.2 API Live, Weights on Hugging Face, Ollama Support
GLM 5.2's API is now live, with model weights available on Hugging Face under MIT license and supported by Ollama. The model offers two thinking modes—High and Max—with 1M context length, priced at $1.4 per 1M input tokens and $4.4 per 1M output tokens, matching GLM-5.1.