EventAI ModelsAugust 24, 2026

Mystery model Ox Alpha unmasked as Zhipu's GLM-5.3-Flash

Ox Alpha appeared free on OpenRouter on August 20 with no company attached, then was identified as Zhipu AI's GLM-5.3-Flash: 320B parameters with 18B active per token and a hybrid linear/sparse attention architecture. A viral 10-task DeepSWE run put it at 80% versus Claude Fable 5's 65% and GPT-5.6 Sol's 52%, but two full 113-task runs landed near 63%, roughly level with GPT-5.6 Sol.

How this story unfolded

3 weeks · 8 reports · 17 community posts · 25 of 27 shown

  1. Aug 21
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  3. Aug 23
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  7. Aug 30
  8. Sep 1
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