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Map / Core AI / Foundation Models / Solar / Open

Solar Open

by Upstage · part of Solar · Text · open weights

Upstage's open-weight Solar models, large mixture-of-experts LLMs from Korea's sovereign AI program, free for commercial use.

Latest version

Open 222 Jul 2026 · 98 days ago

Versions

2since Solar Open 100B in December 2025

All versions

VersionReleasedAfter previousStatusComes asSource
Solar Open 222 Jul 2026203 daysLatest250B total / 15B activeupstage.ai
Solar Open 100B31 Dec 2025First102B total / 12B activehuggingface.co

Dates from Upstage's own announcements; each row links to its source.

The Solar family

2023202420252026TodayProSolar Pro, 4 Dec 20241Solar Pro 2, 10 Jul 20252Solar Pro 3, 26 Jan 20263Solar Pro 4, 6 Aug 20264MiniSolar Mini, 25 Jan 20241Solar Mini 4, 22 Sep 20264OpenSolar Open 100B, 31 Dec 20251Solar Open 2, 22 Jul 2026210.7BSOLAR 10.7B (SOLAR-10.7B-v1.0), 14 Dec 20231.0DecideSolar Decide, 22 Sep 2026, preview1

VersionPreviewLatest version

Questions

What is the latest version of Solar Open?

Solar Open 2, released on 22 Jul 2026.

When was Solar Open 100B released?

Solar Open 100B came out on 31 Dec 2025.