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Solar Pro 4

Upstage · 2026-08-11

Upstage's proprietary Solar Pro 4 model for long document workflows, terminal tasks and repeated tool use, announced in its August 11 launch article. Separate from Solar Open 2.

Benchmark scores

BenchmarkScore
AA-LCR v1.174.0
AA-Omniscience Index-0.8
Arena Code WebDev — Brand & Marketing1389
Arena Code WebDev — Consumer Product1393
Arena Code WebDev — Data & Analytics1358
Arena Code WebDev — Gaming1357
Arena Code WebDev — HTML1394
Arena Code WebDev — React1357
Arena Code WebDev — Reference-Based Design1364
Arena Code WebDev — Simulations1386
Arena Text — Business, Management & Financial Ops (No Style Control)1379
Arena Text — Creative Writing (No Style Control)1288
Arena Text — English (No Style Control)1405
Arena Text — Entertainment, Sports & Media (No Style Control)1302
Arena Text — Exclude Ties (No Style Control)1348
Arena Text — Exclude Ties (Style Controlled)1347
Arena Text — Expert (No Style Control)1400
Arena Text — Hard Prompts (No Style Control)1397
Arena Text — Hard Prompts English (No Style Control)1425
Arena Text — Instruction Following (No Style Control)1359
Arena Text — Legal & Government (No Style Control)1346
Arena Text — Life, Physical & Social Science (No Style Control)1387
Arena Text — Longer Query (No Style Control)1379
Arena Text — Multi-turn (No Style Control)1393
Arena Text — Non-English (No Style Control)1351
Arena Text — Non-English (Style Controlled)1347
Arena Text — Russian (No Style Control)1356
Arena Text — Software & IT Services (No Style Control)1419
Arena Text — Writing, Literature & Language (No Style Control)1323
Arena Text Overall — 25% Factuality1397
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