transformers gguf text-generation en zh dataset:OpenCoder-LLM/opencoder-sft-stage1 dataset:OpenCoder-LLM/opencoder-sft-stage2 arxiv:2411.04905 base_model:infly/OpenCoder-8B-Base base_model:quantized:infly/OpenCoder-8B-Base license:other endpoints_compatible region:us conversational