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Mystery 'Stealth Ox Alpha' Model Lands on OpenRouter: 1M Context, 131K Output & DeepSWE Coding Prowess
LEAD STORYAI & LLMs

Mystery 'Stealth Ox Alpha' Model Lands on OpenRouter: 1M Context, 131K Output & DeepSWE Coding Prowess

Independent researchers fingerprint the anonymous powerhouse as Zhipu AI's upcoming GLM-5.3 release as it scores ~81.4% on DeepSWE benchmarks.

An anonymous frontier AI model labeled 'stealth/ox-alpha' appeared unexpectedly on OpenRouter on August 20, 2026. Boasting a 1,048,576-token context window, 131,072-token generation limits, and multimodal video support, tokenizer fingerprinting strongly suggests it originates from top Chinese lab Zhipu AI.

Cipher_0x·
5 min read