All tasks / Models
Solar Pro 4
Upstage's closed flagship LLM for agentic, document and business tasks in English, Korean and Japanese.
- Upstage
- Closed
- Released Aug 2026
Where it ranks
- BChat & assistantsModels · Cloud · 1,386 on LMArena Text Arena (overall, style control)
- CCodingModels · Cloud · 1,371 on LMArena WebDev / Code Arena (overall)
Facts
- Vendor
- Upstage
- Family
- Solar Pro
- Released
- Aug 2026
- Weights
- Closed: API and apps only
- API price
- $0.3 in / $1.2 out per 1M tokens (list price; scheduled price $0.09/$0.36 until 2026-10-20, then $0.15/$0.60 (excl. VAT))
- Access
- Paid only
- Last verified
- 19 Oct 2026
Price from upstage.ai, 19 Oct 2026.
Benchmark results
| Benchmark | Result | Entry on the leaderboard | As of | Source |
|---|---|---|---|---|
| Artificial Analysis Intelligence Index | 27 | Solar Pro 4Raw value from the page's embedded model data; the site displays it rounded to an integer. | 19 Oct 2026 | artificialanalysis.ai |
| LMArena Text Arena (overall, style control) | 1,386 | solar-pro4From LMArena's official leaderboard-dataset (text_style_control, split latest, category overall, published 2026-10-15), which mirrors https://arena.ai/leaderboard/text. Rank 183; 21281 votes; 95% CI 1381.1-1391.7. | 15 Oct 2026 | huggingface.co |
| LMArena WebDev / Code Arena (overall) | 1,371 | Solar Pro 4From LMArena's official leaderboard-dataset (webdev = Code Arena, split latest, category overall, published 2026-10-18), which mirrors https://arena.ai/leaderboard/webdev. Rank 106; 4655 votes; 95% CI 1360.4-1381.1. | 18 Oct 2026 | huggingface.co |
Where you can use it
No tracked tool lists this model yet.
Earlier versions
- Solar Pro 3 · —