Upstage Unveils 'Solar Pro 3' Specialized for AI Agents... Performance Doubled

Number of Parameters Tripled Compared to Previous Model, with No Increase in Processing Speed or Cost
Performance Doubled in LLM Benchmarks Versus Predecessor

Upstage announced on the 24th that it has unveiled 'Solar Pro 3,' a next-generation large language model (LLM) specialized in artificial intelligence (AI) agents.

Solar Pro 3 is a large-scale model with 102 billion parameters, more than three times larger than the previous Solar Pro 2. Despite this, it maintains the same cost and processing speed (TPS), thereby enhancing efficiency.

Upstage announced on the 24th that it has unveiled 'Solar Pro 3,' a next-generation large language model (LLM) specialized in artificial intelligence (AI) agents. Upstage

In terms of performance, the new model demonstrated improvements throughout the entire process of executing agent work, including multi-step tool calls and complex instruction fulfillment. Specifically, its overall agent performance (Tau2-all), coding capabilities (Terminal Bench 2 and SWE Bench), and instruction-following (IFBench) benchmarks all showed more than double the performance compared to its predecessor.

Additionally, Upstage applied its proprietary reinforcement learning technology 'SnapPO' to further advance the deep reasoning capabilities that are essential for agent AI. Going beyond simple answer generation, the model now features step-by-step reasoning that enhances consistency and contextual judgment. As a result, it achieved strong results in challenging reasoning evaluations such as math competitions (HMMT'26 and AIME'26) and graduate-level science (GPQA-Diamond).

Regarding response quality, Solar Pro 3 better reflects user intent and subtle nuances, thereby improving the perceived quality in practical scenarios. Improved results were recorded in key evaluation metrics, including general user preference (Arena-hard-v2) and Korean user preference (Ko-Arena-hard-v2).

Solar Pro 3 is immediately available through the global AI model service platform 'OpenRouter' and Upstage's own application programming interface (API). According to Upstage, Solar Pro 3 enables organizations to access large-scale model performance at the cost level of a small-scale model.

Seonghoon Kim, CEO of Upstage, stated, "Solar Pro 3 was developed with the aim of advancing beyond mere model performance to deliver practical agent AI utility in real work environments." He added, "Going forward, Upstage will continue to expand the AI ecosystem used in actual industrial fields, leveraging our industry-leading technological prowess."

This content was produced with the assistance of AI translation services.