Wire · technology
Upstage unveils Solar Open 2, open-weight AI model built for autonomous tasks
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Fusion42 · 23 July 2026 · Fusion42 review
Upstage, a South Korean AI company, released Solar Open 2, an open-weight large language model optimised for autonomous agent tasks with 250 billion parameters (15 billion active) and 1 million token context window. The model outperforms DeepSeek V4 Flash, Mistral Medium 3.5, and Cohere Command A+ on agent benchmarks, and beats OpenAI GPT-5.4 mini and Anthropic Claude Haiku 4.5 on Korean language tasks.
This Wire brief sits within Fusion42's coverage of AI Frontier Models and AI Agents, and 3 sources have reported it between 22 Jul 2026 and 23 Jul 2026.
◆ ◆ The Wire takeaway
An open-weight model built specifically for agents (not chat) now has a proven buyer: Upstage itself, deploying it across Daum, finance, law and health. If you're building agent tools or vertical SaaS that needs a reasoning backbone, you have a Korean-made alternative to Anthropic and OpenAI that runs on two H200s and costs nothing to licence.
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3 sources · first reported 22 Jul 2026 · latest 23 Jul 2026
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