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Z.ai released and open-sourced GLM-5.3-Flash, a natively multimodal mixture-of-experts GLM model with a 1M-token context

Open source release Provisional 72% confidence first seen

Z.ai announced the release of GLM-5.3-Flash, describing it as a natively multimodal mixture-of-experts model with a very large (1,048,576-token) context window. Coverage also states that the model was open-sourced and shared alongside performance and deployment notes, including pricing details and claims about using domestically produced AI chips during early testing.

GLM-5.3-Flash Z.ai DeepSWE v1.1 Evaluating Explanations of LLM Behavior in the Wild with Counterfactual Experiments FreeToken: Efficient Edge-Native MoE Serving with Bandwidth-Adaptive Execution GLM-5.2 GLM-5.3 Hugging Face MarkTechPost Ox Alpha Terminal-Bench 2.1

Source coverage

Z.ai Releases GLM-5.3-Flash: A 320B-A18B Natively Multimodal MoE With a 1M-Token Context MarkTechPost Deep Learning Weekly: Issue 470 Deep Learning Weekly

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