[Upstage Console] Solar Pro 4 is now available

Dear Valued Upstage User,

Solar Pro 4 is now available on Upstage Console. You can call it with solar-pro4 as of August 6, 2026, 7:00 AM KST.

Highlights

• Up to 4.7x the performance of Solar Pro 3 on key agent benchmarks: terminal tasks, multi-turn tool use, and long-document reasoning.
• Multi-step tool use: it reads multiple documents, calls tools, checks intermediate results, and delivers finished files in Excel, Word, and PowerPoint.
• Grounded responses: when there's no supporting evidence, it says it can't verify instead of inventing clauses or numbers.
• The model behind Hermes Agent: You can call Solar Pro 4 from Hermes Agent and run agent workflows without writing a line of code.

• Free through August 11, 00:00 UTC (09:00 KST)
• 90% off from August 11 to September 11, 00:00 UTC (09:00 KST): $0.03 input / $0.12 output / $0.006 cached input
• Standard pricing from September 11, 00:00 UTC (09:00 KST): $0.30 input / $1.20 output / $0.06 cached input

For details, see our documentation. If you have any questions, contact us through our Help Center.

Best regards,

The Upstage Team

Terms of Service ⎮ Privacy Policy ⎮ Help center