transformers safetensors qwen2 text-generation unsloth en arxiv:2409.12122 base_model:Qwen/Qwen2.5-Math-1.5B base_model:quantized:Qwen/Qwen2.5-Math-1.5B license:apache-2.0 autotrain_compatible text-generation-inference endpoints_compatible 4-bit bitsandbytes region:us