Z.ai releases GLM-5.3 for frontier coding
Z.ai debuted GLM-5.3, an open-source large language model that set records on several benchmarks. It is based on the GLM-5.2 algorithm released in mid-July, a mixture of experts model with 753 billion parameters.
First seen 14 Aug, 05:19 UTC on Hacker News7 sourcesLast update 62d ago
Z.aiLaunch · 14 Aug
GLM 5.3
Frontier-class model launch
$1.40 / $4.40per M tokens, in / out
1.31Mcontext
Openweights
How GLM 5.3 compares
List prices per million tokens, context and Arena's text leaderboard, against Z.ai's other top models and the leading labs' best. The percentages are GLM 5.3's price against each.
| Model | Released | Input | Output | Context | Arena |
|---|---|---|---|---|---|
| GLM 5.3 | August 2026 | $1.40 | $4.40 | 1.25M | #24 1478 |
| GLM 5.3 Prime | September 2026 | $2.80 -50% | $8.80 -50% | 1M | not ranked yet |
| GLM-5.2 | June 2026 | $1.40 | $4.40 | 1M | #28 1475 |
| Claude Opus 5.5 | September 2026 | $4.00 -65% | $20.00 -78% | 1M | #2 1507 |
| GPT-6 Astra | September 2026 | $10.00 -86% | $50.00 -91% | 1.05M | #30 1475 |
| Gemini 4 Argon | October 2026 | $2.00 -30% | $10.00 -56% | 1M | #1 1525 |
Arena ranks the best effort setting of each model among all models on its text leaderboard. Every model and price.
What the sources say
Linked, never rewritten. Official means the lab itself.
Official0
No word from Z.ai yet.
Press4
The Decoder· 14 Aug, 10:21Zhipu AI releases GLM-5.3, claims it's the strongest open-weights coding modelSiliconANGLE· 14 Aug, 20:35Z.ai debuts GLM-5.3 with long-horizon coding, cybersecurity upgradesOpenRouter· 18 Aug, 20:57Z.ai: GLM 5.3 listed on OpenRouterThe Decoder· 19 Aug, 13:54GLM-5.3 tops the open-model rankings and undercuts rivals on price, but its release is delayedHow it unfolded
Every source in the order it appeared. Times in UTC.
14 Aug 05:19Hacker News GLM-5.3: Frontier coding with emergent cyber capabilities14 Aug 10:21The Decoder Zhipu AI releases GLM-5.3, claims it's the strongest open-weights coding model14 Aug 20:35SiliconANGLE Z.ai debuts GLM-5.3 with long-horizon coding, cybersecurity upgrades14 Aug 21:23Interconnects GLM-5.3: How Chinese labs keep stride with the frontier18 Aug 20:57OpenRouter Z.ai: GLM 5.3 listed on OpenRouter18 Aug 22:06Hacker News GLM-5.3 Artificial Analysis Benchmarks19 Aug 13:54The Decoder GLM-5.3 tops the open-model rankings and undercuts rivals on price, but its release is delayed
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