transformers safetensors stablelm text-generation mergekit merge conversational arxiv:2306.01708 base_model:coffiee/s25 base_model:merge:coffiee/s25 base_model:coffiee/s26 base_model:merge:coffiee/s26 base_model:lxsure/Sniper_21 base_model:merge:lxsure/Sniper_21 autotrain_compatible endpoints_compatible region:us