gguf mistral instruct finetune chatml gpt4 synthetic data distillation dpo rlhf en dataset:mlabonne/chatml_dpo_pairs base_model:teknium/OpenHermes-2.5-Mistral-7B base_model:quantized:teknium/OpenHermes-2.5-Mistral-7B license:apache-2.0 endpoints_compatible region:us conversational