transformers safetensors gptj text-generation pruna-ai base_model:PrunaAI/KoboldAI-PPO_Pygway-6b-Mix-bnb-4bit-smashed base_model:quantized:PrunaAI/KoboldAI-PPO_Pygway-6b-Mix-bnb-4bit-smashed autotrain_compatible endpoints_compatible 4-bit bitsandbytes region:us