transformers safetensors llama text-generation conversational en zh dataset:OpenCoder-LLM/opencoder-sft-stage1 dataset:OpenCoder-LLM/opencoder-sft-stage2 arxiv:2411.04905 base_model:infly/OpenCoder-1.5B-Base base_model:finetune:infly/OpenCoder-1.5B-Base license:other autotrain_compatible text-generation-inference endpoints_compatible region:us