Union Alpha on OpenRouter: Tests and Reviews

A user typed a single sentence into Union Alpha and got back a playable Mario-like game, which the post frames as a real capability demo beyond benchmark scores.

On a real task with 2 repos and 105 planted bugs, Pareto scored 30.7 for $4.81, beating GPT-6 Astra, Opus 5 and others on cost-efficiency, and the author says it is a composite model.

The account says it previously identified 0x Alpha as GLM-5.3 and now fingerprints Union Alpha as Pareto 26.9, linking to its public model fingerprinting notes.

A day after launch, Union Alpha is said to be Pareto 26.9 from TheUnbiasedCo, a router that runs several open and frontier models on the same task and calls a stronger one when needed, priced at $2.50/$7.50 per million tokens, under a quarter of Astra's price.

A tester finds Union Alpha's output better than expected, though generation is slow and timed out once; Cloudflare describes it as a MoA architecture.

Given one four-line prompt and a painting image, Union Alpha, DeepSeek v4.1 Flash and Muse Spark 1.3 each wrote one HTML file blind; Union Alpha was free and produced the most animated code but took 29 minutes.

A post says Union Alpha is a Pareto model from UnbiasedAI that orchestrates GPT-6 Astra, DeepSeek and GLM, priced at $2.50 input and $7.50 output per million tokens.

Someone used Union Alpha to generate a complete, fully playable Super Mario-style platformer in a single file, which the poster calls impressive.

A developer says they received free credits and is preparing to try Union Alpha for the first time in the opencode harness, a coding agent use case.

After testing, a user calls Union Alpha a poor performer that merely routes between Llama, GLM, DeepSeek and GPT, sends requests to third parties, and questions its ZDR promise.

A security researcher posts a guess that the newly launched Union Alpha stealth model is actually GLM 5.4, part of a discussion on identifying stealth models.

The same prompts were run zero-shot on four demos, a lighthouse website, creepy carnival, demake and zombie defense, and the author says Union Alpha wins clearly and by a wide margin.