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Zhipu official blog + Hugging Face model card · Published 2026-08-26

GLM-5.3-Flash: visual understanding and self-hosting

GLM-5.3-Flash’s official card describes native text-and-image input, about 320B total and 18B active parameters, with API and open-weight deployment routes.

GLM-5.3-Flash accepts text and images, with about 320B total and 18B active parameters, plus API and self-hosting routes.
Input modes, parameter definitions and two access routes from Z.ai’s model card. · Open full-size image

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What the official card describes

The model card checked on September 9, 2026 identifies GLM-5.3-Flash as the first native multimodal model in the GLM-5 series, handling text and images. It has about 320B total parameters, with about 18B active during computation: the full model and the portion used in a computation are different measures.

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API and self-hosted access

The card links Z.ai API services and MIT-licensed weights, with deployment materials for SGLang, vLLM, Transformers and other frameworks. These details describe the checked card; the original August 26 source record and August 27 discovery remain in the history.

Sources and notes

sources中文

Sources and notes

Retained summary and context

Official highlights: GLM-5.3-Flash ships "frontier intelligence, flash cost"; the HF model card lists ~321B total parameters (MoE, FP8 mixed precision), MIT license, zh/en and 400K context. A community megathread is live (the ox-alpha rename confirmed from several sides) and AlphaSignal's comparison puts it at Claude Opus level for a tenth of the price.

[Evidence provenance: official blog and HF card plus third-party retelling] The "Opus-level at a tenth of the price" framing follows AlphaSignal's comparison, not an independent review; local hands-on numbers await the megathread, and attention is not proof.

Sources and evidence · 4 links

Each link has a purpose and scope. Link counts do not establish independent confirmation; direct support applies only to the statements specified below.

Source timeline
  1. · Entered the BitShovel radar: 25 entries visible on Reddit r/LocalLLaMA at collection; official blog and HF card checked editorially.
  2. · Lateral (Zhipu GLM): "Zhipu's Tang Jie announces GLM-5.3 Flash topping OpenRouter on the AA index" (zh post, translated)
  3. · Lateral (Zhipu GLM): "GLM-5.3-Flash open-sourced: 320B total parameters, AA index of 57, priced at Opus 4 levels" (zh post, translated)
  4. · Lateral (Zhipu GLM): "Z.ai's GLM-5.3-Flash Matches Claude Opus at" — lead via AlphaSignal daily. Same-class chatter recorded for the vertical judgement and the retire decision.
  5. · Lateral (Zhipu GLM): "GLM-5.3 weights will be released tomorrow" — lead via Reddit r/LocalLLaMA. Same-class chatter recorded for the vertical judgement and the retire decision.
  6. · Lateral (Zhipu GLM): "GLM-5.3 Flash Unsloth GGUF now available" — lead via Reddit r/LocalLLaMA. Same-class chatter recorded for the vertical judgement and the retire decision.
  7. · Release watch (Zhipu GLM): "GLM-5.3 open weights released, strongest at agentic coding and cyber defense" (zh post, translated)
  8. · Release watch (Zhipu GLM): "Zhipu open-sources GLM-5.3 weights, leading on agentic coding and network defense" (zh post, translated)
  9. · Release watch (Zhipu GLM): "Perplexity Adds Z.ai's GLM 5.3 to Power Deep Res" — lead via AlphaSignal daily. Same-class release moves reshape expectations and alternatives.
  10. · Comparison (Zhipu GLM): "Humaneval benchmark for Deepseek V4 Flash 0731 v" — lead via Reddit r/LocalLLaMA. Same-class comparisons and sentiment signal the market's relative standing.
  11. · Comparison (Zhipu GLM): "Z.ai's GLM-5.3 Beats GPT-5.6 on Coding Without T" — lead via AlphaSignal daily. Same-class comparisons and sentiment signal the market's relative standing.
  12. · Comparison (Zhipu GLM): "Z.ai's GLM-5.3 Beats Claude and GPT-5 on Hacking" — lead via AlphaSignal daily. Same-class comparisons and sentiment signal the market's relative standing.
  13. · Release watch (Zhipu GLM): market chatter captured via ithome (headline in Chinese). Same-class release moves reshape expectations and alternatives.
  14. · Release watch (Zhipu GLM): "LayerStoRm open-source expert streaming: 1M cont" — lead via reddit-local-llama. Same-class release moves reshape expectations and alternatives.
Collection record

First discovered:

Collection and source publication have distinct dates.

Editorial record

Corrected

· Beijing time (UTC+8)

The title now names the use or discussion covered in the article, removing collection ranks, unqualified promotional wording and overstatement. Original sources, historical prices and dates remain; this edit does not represent a new release or price change.

Sources and full record

This dates our review of the wording and sources, not a project release or product update.

Full record: before, after and sources (JSON)

Corrections and feedback