Union Alpha on OpenRouter: Tests and Reviews

A user says Union Alpha produced only one SVG before failing across Claude Code, OpenCode, Cline and Hermes, briefly hitting 7 tps before stopping.

After trying Union Alpha, aisearchio says it differs noticeably from earlier GLM and MiniMax models and likely isn't from either company.

A user says Union Alpha's results are far below Astra and possibly weaker than 5.6 Sol, arguing a low price matters little when output is visibly worse.

A user prompted Union Alpha to reveal its real model and says it answered ChatGPT and OpenAI, with tokenizer tests and direct answers to sensitive questions leading them to guess it is OpenAI's GPT-6 Luna.

An anonymous stealth model called Union Alpha has shown up on OpenCode, reportedly competing with GPT-6 Astra on DeepSWE and scoring well on an internal terminal benchmark, with free access for a week and its lab still unconfirmed.

A user who tested Union Alpha says it doesn't feel like any Chinese model: it calls subagents even for simple tasks, behaves like Sakana Fugu, is very slow and gets stuck in loops, with one test running two hours only to say it couldn't finish.

The poster rules out GLM and Kimi as guesses for Union Alpha based on how it feels to use, without giving specific evidence, and is left wondering what it is.

A user sent a single letter and Union Alpha output "I'm GLM, made by Z.ai," leading them to conclude it is an anonymous preview of Zhipu's unreleased GLM-5.4 or GLM-5.5.

The author is running the Union Alpha stealth model in Consept and questioning whether it holds up to reported DeepSWE and Terminal Bench 4 results on par with GPT-6 Astra and the upcoming Grok 4.7.

Union Alpha is a 256K-context multimodal model built for long, complex coding tasks, with near GPT-6 Astra and Opus 5 performance at roughly 18x lower expected cost, now free on OpenCode, OpenRouter and Cline.

A tester asked Union Alpha to generate a car scene in Three.js and needed two hours to get a presentable result, finding it far less realistic than Kimi and closer to a Flash-level or GLM-family model.

Based on its vision ability, answers to political questions such as Taiwan, and output structure, the author concludes the anonymous model is Mistral, with only a small chance of being MiniMax.