Solar Open 100B

Name: Solar Open 100B
Author: Upstage

UpstageOpen WeightsPending Human Review

Solar Open 100B is Upstage’s first large open-weight Solar mixture-of-experts model, with 102.6B total parameters and 12B active per token. It targets English and Korean reasoning, instruction following, coding, and agentic work with 128K context. Although a model card existed earlier in December, weight-bearing repository commits appeared on December 31; the earlier teaser is not treated as availability. Current weights use the custom Upstage Solar License while accompanying code uses Apache 2.0. This is the first-generation Solar Open checkpoint, distinct from Solar Open 2’s later 250B hybrid-attention architecture.

2025-12-31

102.6B total, 12B active

Mixture-of-Experts Transformer

Upstage Solar License

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Specifications

Parameters: 102.6B total, 12B active
Architecture: Mixture-of-Experts Transformer
License: Upstage Solar License
Context Window: 131,072 tokens
Type: text
Modalities: text

Benchmark Scores

Advanced Specifications

Model Family: Solar
API Access: Not Available
Chat Interface: Not Available
Multilingual Support: Yes
Variants: Solar-Open-100BSolar Open 1quantized deployment variants

Capabilities & Limitations

Capabilities: reasoningcodinginstruction followingmultilingualtool calling
Known Limitations: Custom weight license differs from Apache-licensed codeFull 102.6B weight storage is required despite sparse activationCurrent license differs from early teaser wording
Notable Use Cases: private bilingual assistantsself-hosted enterprise agentsdomain-specific fine-tuning
Function Calling Support: Yes
Tool Use Support: Yes

Resources

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