Mystery model Ox Alpha identified as GLM-5.3 Flash
Black-box fingerprinting (tokenizer +75 offset, z.ai error strings) and prompt-injection analysis identify OpenRouter's anonymous 'ox-alpha' as Z.ai's unreleased GLM-5.3 Flash. A Flash model reportedly outperforming frontier models like Fable and GPT Sol, intensifying pressure on US labs.
How this story unfolded
4 days · 0 reports · 8 community posts · from Aug 21
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