transformers safetensors mistral text-generation mergekit merge conversational base_model:Q-bert/Optimus-7B base_model:merge:Q-bert/Optimus-7B base_model:mistralai/Mistral-7B-Instruct-v0.2 base_model:merge:mistralai/Mistral-7B-Instruct-v0.2 autotrain_compatible text-generation-inference endpoints_compatible region:us