**Stealth Multimodal AI Model Matches Frontier Performance at a Fraction of Cost

**Stealth Multimodal AI Model Matches Frontier Performance at a Fraction of Cost**

> A previously unknown &\#039;stealth&\#039; multimodal AI model named &\#039;Union Alpha&\#039; has emerged, claiming performance comparable to frontier models like Claude Fable 5.1 and GPT-6 Astra on the Terminal-Bench 4.0 benchmark. Japan A Stealth Multimodal AI Model Matches Frontier Performance at a Fraction of the Cost A previously unknown &\#039;stealth&\#039; multimodal AI model named &\#039;Union Alpha&\#039; has emer...

**来源信息**
- **来源**：Hacker News：AI 热帖
- **分类**：论文
- **发布时间**：2026-09-18 01:46（北京时间）
- **原文**：[打开原文](https://asiaai.fyi/stealth-multimodal-ai-model-frontier-performance)