About this model or application
Solar Mini 4 and Pro 4 serve agent workloads through the Upstage API; Solar Open and Open 2 are downloadable MoE models. Pricing belongs to the specified Upstage endpoint.
Family & other versions4 sources
Background for the family or other versions. These sources are counted separately from evidence for this release.
Family & other versions
Official model specifications and deployment information.
Family & other versions
Official model specifications and deployment information.
Family & other versions
Official model specifications and deployment information.
Family & other versions
Official model specifications and deployment information.
Model family catalog4
Current models
Official catalogSolar Mini 4Available512K ContextAPIMaker app
- Model ID
solar-mini4- Released
- 2026-10-01
- Availability
- Available
- Input
- Text
- Output
- Text
- Context
- 512,000 tokens
- Max output
- 128,000 tokens
- Parameters
- 35B / 3B active
- Deployment / access
- API · Maker app
- Capabilities
- Reasoning · Tool use · Structured output
First-party endpoint pricing
USD / million tokens- Input
- 0.1
- Output
- 0.4
Upstage direct API standard rate; cached input $0.01/1M. Launch discount separate.
Standard prices shown; the announcement offers a 70% Console launch discount through Oct 10 UTC, subject to changing terms. Reasoning is off by default.
Solar Pro 4Available512K ContextAPIMaker app
- Model ID
solar-pro4- Released
- 2026-08-11
- Availability
- Available
- Input
- Text
- Output
- Text
- Context
- 512,000 tokens
- Max output
- 128,000 tokens
- Deployment / access
- API · Maker app
- Capabilities
- Reasoning · Tool use · Multilingual
First-party endpoint pricing
Upstage direct API standard rate; announcement launch discount ended Sept 10 UTC.
Solar-Open2-250BAvailable1M ContextOpen weights
- Model ID
upstage/Solar-Open2-250B- Released
- Not stated
- Availability
- Available
- Input
- Text
- Output
- Text
- Context
- 1,000,000 tokens
- Parameters
- 250B / 15B active
- Deployment / access
- Open weights · Local
- Weights
- Open weights
- License
- upstage-solar-license
- Capabilities
- Reasoning · Tool use
Custom Upstage Solar License; distributed derivative AI models must begin with Solar and display Built with Solar.
Solar-Open-100BAvailable128K ContextOpen weights
- Model ID
upstage/Solar-Open-100B- Released
- Not stated
- Availability
- Available
- Input
- Text
- Output
- Text
- Context
- 128,000 tokens
- Parameters
- 102.6B / 12B active
- Deployment / access
- Open weights · Local
- Weights
- Open weights
- License
- upstage-solar-license
- Capabilities
- Reasoning · Tool use
Custom Upstage Solar License; distributed derivative AI models must begin with Solar and display Built with Solar.