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Solar Pro 4
● liveOn the board as live since 2026-08-07 — the watchers keep tracking it: lineup changes, pricing moves and deprecations all alert.
Launch details
Live — our sweep read upstage/solar-pro4 at $0.3/$1.2 per 1M, 524k ctx, on Aug 7, and upstage/solar-mini4 at $0.05/$0.20, same 524k ctx, on Sep 23; this row stands for the whole Solar line; that Upstage is a Korean lab and that Mini 4 is a 35B MoE with 3B active is search-grade, not our own reading.Answering in 1.0s· answered Live model status →
Watch for the next frontier model, free →Launch report (PDF)
Timeline
Where to use Solar Pro 4
6 providers list Solar Pro 4 in the models.dev catalog (as of 2026-11-07), under the model ids shown below.
upstage/solar-pro4upstage/solar-pro4upstage/solar-pro4upstage/solar-pro4upstage/solar-pro4 · upstage/solar-pro4:thinkingsolar-pro4Listings cover the model family, so a provider may list a sibling tier under the same name. Check the id before you build on it.
Solar Pro 4: quick answers
Is Solar Pro 4 out?
Yes. Solar Pro 4 is live and has been since August 7, 2026.
When was Solar Pro 4 released?
August 7, 2026.
Who makes Solar Pro 4?
Upstage.
Where can I use Solar Pro 4?
6 providers list it in the models.dev catalog, including OpenRouter, AI/ML API, Kilo Gateway, LLMTR and NanoGPT. The exact model ids each one lists are on this page.
Cite this page
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<a href="https://artificialwatch.com/model/solar-4">Solar Pro 4 on ArtificialWatch</a>ArtificialWatch, "Solar Pro 4", https://artificialwatch.com/model/solar-4Know when the next frontier model drops. Free.
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