Upstage: Solar Pro 3

Text input Text output
Author's Description

Solar Pro 3 is Upstage's powerful Mixture-of-Experts (MoE) language model. With 102B total parameters and 12B active parameters per forward pass, it delivers exceptional performance while maintaining computational efficiency. Optimized for Korean with English and Japanese support.

Key Specifications
Cost
$$$
Context
128K
Parameters
102B (Rumoured)
Released
Jan 26, 2026
Speed
Ability
Reliability
Supported Parameters

This model supports the following parameters:

Tools Response Format Structured Outputs Temperature Tool Choice Max Tokens Reasoning Include Reasoning
Features

This model supports the following features:

Reasoning Structured Outputs Tools Response Format
Performance Summary

Upstage's Solar Pro 3, a 102B parameter Mixture-of-Experts model with 12B active parameters, demonstrates competitive response times, ranking in the 54th percentile for speed. It also offers cost-effective solutions, placing in the 67th percentile for price. A standout feature is its exceptional reliability, achieving a perfect 100% success rate across all benchmarks, indicating consistent and usable responses. The model exhibits strong performance in General Knowledge (95.5% accuracy) and Ethics (99.0% accuracy), showcasing its ability to handle broad factual queries and ethical dilemmas effectively. Its Mathematics (85.0% accuracy) and Coding (82.0% accuracy) capabilities are also solid. However, Solar Pro 3 shows notable weaknesses in Hallucinations, with only 52.0% accuracy in acknowledging uncertainty, and Instruction Following (50.0% accuracy), suggesting areas for improvement in handling ambiguous or complex directives. Its Email Classification accuracy (92.0%) is decent but ranks lower compared to other models.

Model Pricing

Current Pricing

Feature Price (per 1M tokens)
Prompt $0.15
Completion $0.6
Input Cache Read $0.015

Price History

Available Endpoints
Provider Endpoint Name Context Length Pricing (Input) Pricing (Output)
Upstage
Upstage | upstage/solar-pro-3 128K $0.15 / 1M tokens $0.6 / 1M tokens
Benchmark Results
Benchmark Category Reasoning Strategy Free Executions Accuracy Cost Duration