Union Alpha on OpenRouter: Tests and Reviews

A user calls Union Alpha a disaster and says the DeepSWE score claimed by its creators is too good to be true, prompting an update to their own evaluation.

A Chinese user says the new mystery model Union Alpha cannot even pass the candy test and questions whether it can beat GPT 6 Astra High.

A user who tested Union Alpha says it thinks cautiously and resembles a gateway with a lead model supervising and self-checking, though official compute is tight.

bindureddy calls Union Alpha mediocre and likely a mix of cheap models plus a router, with benchmark scores below GLM 5.3, and says it is over-hyped but free on ChatLLM.

A user posted a screenshot claiming the stealth model Union Alpha exposed its own identity as Cloudflare, not Zhipu or Gemini, and said there is no need to keep testing it.

A tracking account says Union Alpha's token counts match the standard Llama 3 tokenizer, offering it as a fingerprint clue to the model's identity.

OpenRouter is offering a week of free API calls on a new anonymous model called Union Alpha, which the author says is almost certainly Chinese, citing Z.ai's similar move last time.

A video compares Union Alpha's building generation with DeepSeek, GPT-6 Astra and Kimi K3, claiming it matches DeepSeek 4.1 Flash using only a tenth of the tokens.

According to @blueemi99, Union Alpha appears to use OpenAI's tokenizer, and a live GPT model matched its cutoff behavior on 3/3 prompts, prompting guesses of GPT-6 Luna or GPT-OSS 2.

A user says Union Alpha is not as good as Astra or Fable but is free for a week and performs well, arriving just as their Codex limits run low.

A tracking account says AWS Ohio fetches and a vLLM/GLM5Next build only expose infrastructure, not ownership, and retracts its claim that Z.ai built Union Alpha.

SadCreatorTalks says an anonymous free coding model, Union Alpha, has appeared on OpenRouter with 262k context, image support and agent workflows, and has pointed their agent at it.