Solar Open 2
Solar Open 2 is available now for rag, agents, and long context with open-weight and 1.05m context; evaluate it while provider pricing coverage matures.
- Family
- Solar Open
- Released
- 2026-07-22
- Context
- 1.05m
- Parameters
- 250B (15B activated)
- Architecture
- Mixture of Experts
- Specialization
- general
- Openness
- Open weights
- License
- Upstage Solar LicenseCommercial use: permitted
- Weights
- Available
- Code
- Unknown
- Training
- Multi-stage
No tracked provider token pricing is available yet.
About
Upstage Solar Open 2 (HF upstage/Solar-Open2-250B) is a 250B-total / 15B-active hybrid-attention mixture-of-experts LLM built for agentic office, document and coding work. It interleaves three linear-attention layers with one softmax-attention layer and drops positional encoding (NoPE), enabling a 1M-token context. Languages: English, Korean, Japanese. Reasoning effort is controllable. Weights are under the Upstage Solar License (Apache 2.0-based with a Solar-branding requirement for derivatives).
Provider price ladder
No tracked provider token pricing is available for this model yet.
Capabilities
Benchmark peer barsfor RAG
No task-mapped benchmark peers are available for this model yet.
Migration checks
No linked migration route is available for this model yet.
API versions
upstage/Solar-Open2-250BSolar Open 2No tracked provider token pricing is available yet.