upstage/solar-pro4Solar Pro 4 is Upstage’s AI model, released Aug 10, 2026. It costs $0.30/M input and $1.20/M output tokens, and handles a 524K-token context window.
Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window.
Scores on standardized evaluations. Higher is better — and rank shows where Solar Pro 4 lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Scientific research coding
Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window.
Solar Pro 4 is an AI model developed by Upstage, released Aug 10, 2026.
Solar Pro 4's list price from Upstage is $0.30 per million input tokens and $1.20 per million output tokens.
Solar Pro 4 supports a context window of up to 524K tokens.
On standardized evaluations tracked by Epoch AI, Solar Pro 4 scores 89.1% on GPQA Diamond, 29.2% on Humanity's Last Exam, 43.6% on SciCode.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Aug 20, 2026.