Union Alpha on OpenRouter: Tests and Reviews

A demo of the union-crew repo has Union Alpha dispatch DeepSeek V4.1 Flash subagents to run low-cost agent workflows and work around GPT-6 usage limits.

The author used a Union Alpha 3D game recording as a prompt to rebuild the game in Antigravity with Gemini and in Cursor with Grok 4.6, where Grok won, after Cline with OpenRouter failed to use Union Alpha.

A demo shows running Union Alpha in OpenCode via the union-crew repo, handing subtasks to DeepSeek V4.1 Flash subagents to cut costs.

A Chinese user tested Union Alpha on tasks like a pelican riding a bicycle and found results random, with completion times ranging from one minute to half an hour, suggesting it suits only short tasks.

An eight-item tech brief notes that the anonymous model Union Alpha landed on OpenRouter and processed about 2 billion tokens on its first day, with a 260K context window, multimodal input, tool calling and free blind testing.

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.

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.

The author says these game demos were all generated by Union Alpha, now free in Grotto Studio, at roughly 1–5 cents per asset, and shares a demo they iterated on.

OrcaRouter has launched a free stealth Union Alpha endpoint with 262K context, text and image input, tool calling and structured outputs, compatible with the OpenAI API.

The author says Union Alpha is free on opencode and pairs with deepseek-v4.1 flash as subagents, matching GPT-6 Astra at 18x lower price, and gives an 18-second Codex setup.

The author gave Union Alpha, GPT-6 Astra, Zhipu 5.3 Flash and DeepSeek V4.1 Flash the same HTML rocket launch task; all four completed it, and Union Alpha was slightly less precise at reading the prompt but still generated strong results.