Solar Mini 4

Solar Mini 4 is a 35-parameter mixture-of-experts model from Upstage with 3B active parameters and a 524K token context window.

Strengths

Its mixture-of-experts architecture keeps inference efficient while maintaining a very large context window for processing lengthy documents and complex multi-turn interactions.

Best for

Agentic workflows, document processing, and tasks where a deep context window is valuable but inference speed and resource use are constraints.

Limitations

As a compact model, it trades capability for efficiency and sits below Solar Pro 4 for workloads demanding higher reasoning complexity or nuance.