transformers mistral text-generation gpt llm large language model h2o-llmstudio conversational en arxiv:2401.16818 base_model:h2oai/h2o-danube2-1.8b-chat base_model:finetune:h2oai/h2o-danube2-1.8b-chat license:apache-2.0 autotrain_compatible region:us