Here's a complete, battle-tested end-to-end script specifically designed for fine-tuning the MXFP4-quantized MoE GPT-oss-20B model on your 4รA10G (96GB) setup. This leverages QLoRA for memory efficiency while handling MXFP4 quantization properly.
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Fine-tune MXFP4-quantized MoE GPT-oss-20B with QLoRA
Hardware: 4ร NVIDIA A10G (24GB VRAM each)
Key Tech: bitsandbytes (MXFP4), PEFT (QLoRA), FlashAttention-2, DeepSpeed ZeRO-3
"""