Solar Pro 4

Name: Solar Pro 4
Author: Upstage

Upstage · 2026-08-06

Upstage's proprietary Solar Pro 4 model for long document workflows, terminal tasks and repeated tool use. Upstage's model card and model history list the solar-pro4-260806 snapshot, served by the solar-pro4 alias, as released on August 6, 2026; the launch article followed on August 11. Separate from Solar Open 2.

Benchmark scores

Benchmark	Score
Arena Code WebDev — Brand & Marketing	1384
Arena Code WebDev — Consumer Product	1383
Arena Code WebDev — Content Creation Tools	1361
Arena Code WebDev — Data & Analytics	1356
Arena Code WebDev — Frontend	1369
Arena Code WebDev — Fullstack	1426
Arena Code WebDev — Gaming	1378
Arena Code WebDev — HTML	1371
Arena Code WebDev — React	1362
Arena Code WebDev — Reference-Based Design	1368
Arena Code WebDev — Simulations	1375
Arena Text — Business, Management & Financial Ops (No Style Control)	1381
Arena Text — Chinese (No Style Control)	1423
Arena Text — Creative Writing (No Style Control)	1318
Arena Text — English (No Style Control)	1415
Arena Text — Entertainment, Sports & Media (No Style Control)	1333
Arena Text — Exclude Ties (No Style Control)	1361
Arena Text — Exclude Ties (Style Controlled)	1361
Arena Text — Expert (No Style Control)	1428
Arena Text — French (No Style Control)	1403
Arena Text — French (Style Controlled)	1404
Arena Text — German (No Style Control)	1357
Arena Text — Hard Prompts (No Style Control)	1400
Arena Text — Hard Prompts English (No Style Control)	1428
Arena Text — Instruction Following (No Style Control)	1374
Arena Text — Japanese (No Style Control)	1320
Arena Text — Korean (No Style Control)	1391
Arena Text — Legal & Government (No Style Control)	1384
Arena Text — Life, Physical & Social Science (No Style Control)	1403
Arena Text — Longer Query (No Style Control)	1382