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GLM-5.3-Flash

Model ● Covered in 12 stories + Follow

GLM-5.3-Flash is a 320B, natively multimodal mixture-of-experts model from Z.ai that activates 18B parameters and supports a 1,048,576-token context. Recent coverage says Z.ai released GLM-5.3-Flash in late August, published related code/weights on Hugging Face, and reported pricing that it positions as cheaper to run; tests also describe comparable accuracy to GLM-5.3 on some tasks while varying latency by workload. The model has also been referenced in coverage about Z.ai building production inference infrastructure around it and in a security-focused context where locally deployable “worker” models support vulnerability research.

Updated 13 October 2026

Specifications

No specifications recorded yet.

Latest developments

Z.ai GLM-Legal Beats Claude Fable 5 and Kimi K3 on Harvey LAB MarkTechPost · 6 days ago · 20 Can an Open Model Do Security Research? Cantina’s apex-flash-1 Solves 40 of 60 Held-Out Bug Tasks MarkTechPost · 2 weeks ago · 9
Forget AGI, Here Comes RSI: Z.ai Says Its GLM Model Built Its Own Inference Infra Trending Topics · 1 month ago · 39
The Sequence Learning Loop - Issue 925: Learn About Fable and Mythos 5.1, GLM-5.3-Flash, and Qwen 3.8 TheSequence · 1 month ago · 49
GLM-5.3-Flash vs. GLM-5.3: Time and money, not the spec sheet The New Stack · 1 month ago · 15 GLM-5.3-Flash vs Qwen3.8-Flash-Next: Two Chinese AI Labs Independently Converge on the Same Model Architecture MarkTechPost · 1 month ago · 7
Z.ai’s GLM-5.3 goes open weight, but its new license aims at hyperscalers The New Stack · 1 month ago · 35 Deep Learning Weekly: Issue 470 Deep Learning Weekly · 1 month ago · 45

Timeline

Month Quarter Year

Q4 2026

Q3 2026

Google launches Gemini 3.8 Flash and related agentic video understanding capabilities for its Gemini Flash models Model release

Alibaba releases Qwen3.8-Flash-Next, an open-weight multimodal Mixture-of-Experts model Open source release

Z.ai released GLM 5.3 as open-weight frontier AI software and published licensing terms that require larger commercial hosts to undergo a security review. Open source release

Nvidia reportedly agrees to acquire Hugging Face for about $12.9 billion to bring the AI platform and open-model repository under Nvidia ownership Acquisition

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

Z.ai releases and open-sources its Ox Alpha model as GLM-5.3-Flash, and publishes the model weights for deployment on Hugging Face and inference platforms Open source release

Relationships

Products & technology

  • Z.ai develops this model · 8 sources
  • Derived from ox-alpha · 1 source
  • Zhipu develops this model · 1 source
  • Z.ai deploys this model · 1 source
  • The New Stack integrated with this model · 1 source
  • apex-flash-1 derived from this model · 1 source
  • GLM-Legal derived from this model · 1 source

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