Experience stronger Korean fluency in the new Solar Pro & Mini

At Upstage, we're dedicated to building AI models that truly understand and communicate in  multiple languages, and Korean is one of the most important languages we consider. With the recent update of Solar Pro and Solar Mini (released Apr 22), we're excited to introduce major improvements in Korean fluency, across a wide range of use cases.

A leap forward in Korean fluency

Korean fluency is more than just grammar—it's about sounding natural, clear, and aligned with the user's intent. Our internal metric, ko-fluency tracks exactly that—and both Solar Pro and Mini saw significant upgrades in this release.

• Solar Pro: Increased from 74.4 to 82.0 by +7.6 points, resulting in smoother, more natural conversations.
• Solar Mini: Increased from 81.2 to 82.1 by +0.9 points, a meaningful gain at this scale.

Solar Pro:  Even stronger for Korean use cases

Solar Pro continues to be our top-tier model for enterprise-grade reasoning and structured output. This update makes it even more powerful for Korean users, including:

• Major benchmark improvements, including Ko-MT-Bench from 71.8 → 81.0 (+9.2)
• Sharper and cleaner outputs: Better summaries, clearer writing, and a more confident tone.

Available now

Updated versions of both Solar Pro and Solar Mini are available on:

• Upstage Console
• AWS Marketplace
• On-premises (Contact Us for more information)

If you're building Korean AI services, or simply want a smarter, more fluent assistant—this release is for you.