StableLM 2 12B

StableLM 2 12B is Stability AI's mid-size open language model, a 12.1-billion-parameter decoder-only transformer trained on 2 trillion tokens across English, Spanish, German, Italian, French, Portuguese, and Dutch. Released in April 2024 with base and chat-tuned variants, it was positioned as an efficient multilingual foundation for fine-tuning, with post-training through supervised fine-tuning, direct preference optimization, and self-knowledge learning.

The weights are available under the Stability AI Community License, which permits research and non-commercial use but requires a separate commercial license for business deployment, a nuance worth checking before productizing. The smaller 1.6B sibling in the same family was noted at launch as a leading open model under 2B parameters, but the 12B remains the practical choice for multilingual chat and instruction tasks.