transformers safetensors llama text-generation mergekit merge arxiv:2306.01708 base_model:HuggingFaceH4/mistral-7b-grok base_model:merge:HuggingFaceH4/mistral-7b-grok base_model:NousResearch/Llama-2-7b-chat-hf base_model:merge:NousResearch/Llama-2-7b-chat-hf autotrain_compatible text-generation-inference endpoints_compatible region:us