Model · Language model
Solar Mini 4
Upstage's September 2026 Solar Mini 4 compact release for agentic use, with 35B total and 3B active parameters and 512K context, served as a managed API with no public artifact of any kind.
- Developer
- Upstage
- Distribution
- Developer API
- Artifact licensing
- Proprietary access
- License scope
- Reviewed release artifacts and mandatory terms; not an assessment of training code or training data openness.
- Licenses
- Proprietary
- Boundary
- This record represents the Solar Mini 4 release of September 22, 2026, served as the solar-mini4-260922 API version behind the solar-mini4 alias with 512K context and 128K max output. The Solar Jev decision model that Upstage serves on Solar Mini 4, earlier and larger Solar lines, and the platform itself are separate boundaries.
Risk statements
Not yet examined.
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