Union Alpha on OpenRouter: Tests and Reviews

The author ran Union Alpha with a Claude Code harness to build a BMW M5 CS 3D model in three.js, saying the result beat GPT 5.6 Sol's poor SVG output.

The author tested Union Alpha's front-end ability via Cline, calling it roughly GPT-5.6 Terra level but extremely slow, with frequent errors through OpenCode and OpenRouter.

A tracking account ran tokenizer fingerprint tests: text-only counts mixed Qwen and Llama, while image-input tests consistently matched GLM, making GLM the more likely base.

A user mocked Union Alpha's SVG of a pelican riding a bicycle as structurally broken, questioning its near-Astra and Fable scores as benchmark-optimized.

A user had Union Alpha build an iPhone duo landing page via opencode; it took 3 hours and the result was only 'eh', with a Minecraft test planned next.

A user ran Union Alpha through the Claude Code harness to generate a pelican riding a bicycle SVG; the SVG was very bad while the same model's 3D output was very good.

A user says Union Alpha is working fine in Cline, is already running another test, and responds to reports that it doesn't work for some people.

aimlapi says its benchmark only covers Union Alpha and Ox Alpha, and that Union is much better than Ox while using one-third of the tokens.

The author notes that the people who correctly identified OX Alpha before its release have not claimed to know what Union Alpha is, so the GLM guess may not hold.

The author posts a video of Union Alpha being run through the Banana Test to show how it performs.

A Persian-language user says Union Alpha is currently free on opencode, cline and OpenRouter, with the opencode free period lasting about a week, and rates it near Astra while guessing it is a Chinese model.

The post says Union Alpha leads on the DeepSWE benchmark, offering GPT-6 Astra and Claude Opus 5 capability at DeepSeek v4 Flash prices.