transformers safetensors stablelm text-generation arxiv:2402.17834 arxiv:2104.09864 arxiv:2204.06745 arxiv:1607.06450 arxiv:2302.05442 arxiv:2309.14322 arxiv:2305.14201 arxiv:2101.00027 arxiv:2305.06161 arxiv:2309.09400 arxiv:2206.11147 arxiv:1910.02054 autotrain_compatible endpoints_compatible 4-bit bitsandbytes region:us