transformers safetensors llama text-generation mergekit merge conversational arxiv:2203.05482 base_model:Nitral-Archive/Echidna-7b-128k base_model:merge:Nitral-Archive/Echidna-7b-128k base_model:gradientai/Llama-3-8B-Instruct-262k base_model:merge:gradientai/Llama-3-8B-Instruct-262k autotrain_compatible text-generation-inference endpoints_compatible region:us