Stealth model Union Alpha on OpenRouter rumored to be Zhipu's GLM 5.4
zephyr_z9 · x · 2026-09-17
A new stealth model "Union Alpha" appeared on OpenRouter — multimodal, free, 256K context, tool calling, claimed frontier-level performance. @eliebakouch notes its tokenizer appears identical or similar to the GLM 5 series and the model often identifies itself as GLM from ZAI, suggesting it's Zhipu's unannounced GLM 5.4. Unconfirmed.
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