Solar Mini 4
Upstage’s compact 35B MoE (3B active) for fast agentic work.
Solar Mini 4 is Upstage’s small, efficient model: a 35B mixture of experts with 3B active parameters, designed for agent use cases where quick responses matter.
- Provider
- Upstage
- Type
- Language model
- Released
- Sep 23, 2026
- Input
- text
- Output
- text
- Open weights
- No
Best for
- Agents
- High volume / low cost
- Real-time / low latency
- Long context
Strengths
- 3B active parameters
- Built for responsive agents
More from Upstage
- Solar Pro 4 — Upstage. Upstage’s reasoning model for long, document-heavy and agentic work.
- Solar Decide — Upstage. Upstage’s structured decision endpoint built on Solar Mini 4.