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Union Alpha

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stealth/union-alpha

Union Alpha is an AI model, released Sep 16, 2026. It handles a 262K-token context window.

Union Alpha is a multimodal model built for research, coding, and agentic workflows, while delivering frontier-level performance across a broad range of general-purpose tasks.

Context
262K
Input
— / 1M
Output
— / 1M
Released
Sep 16, 2026
Modalities
textimage→text

Benchmarks

Scores on standardized evaluations. Higher is better — and rank shows where Union Alpha lands among all models tracked on Model Beat.

No standardized benchmark scores from Epoch AI yet — common for very recent, image, or niche models. Scores appear here once published.

Changelog

1
  • Union Alpha added to the tracker: 262K context.tracked · Sep 16, 2026

Compare Union Alpha with

Union Alpha vs GPT-6 AstraUnion Alpha vs Claude Fable 5Union Alpha vs Kimi K3Union Alpha vs Grok 4.6Union Alpha vs DeepSeek-V4-Pro-0813

Frequently asked questions

What is Union Alpha?

Union Alpha is a multimodal model built for research, coding, and agentic workflows, while delivering frontier-level performance across a broad range of general-purpose tasks.

What is Union Alpha's context window?

Union Alpha supports a context window of up to 262K tokens.

Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Sep 18, 2026.