Model details
模型介绍 中文整理 SDLM-32B-D4 模型卡片
Model use case SDLM(Sequential Diffusion Language Model,序贯扩散语言模型)旨在以低成本激发扩散模型的并行预测能力。该模型通过将预测范围限制在固定块长度来减少分布偏移,并采用最长前缀解码方法强制执行解码顺序,从而在保证生成质量的同时显著提高预测效率。SDLM可视为自回归范式的进一步推广,因此可以使用预训练的自回归权重,仅需进行少量指令微调即可快速迁移到扩散框架。
主要能力
SDLM在保持与自回归模型相当精度的同时,解码速度提升约2倍。在MATH-500基准测试中,相比其他扩散语言模型最高可实现5倍加速。模型采用序贯块级掩码预测方法,利用位置索引较低 token 通常受益于更可靠的上下文信息这一观察结果,降低偏差并提高准确率。
输入输出
输入:文本 token 序列
输出:生成的文本 token 序列
解码方式:每步预测 D 个 token,保留最长连续的高置信度 token(1 ≤ n ≤ D),缓存的 token 被复用以节省计算。
运行要求 基础模型:Qwen2.5-32B
依赖项:transformers 等相关库
运行脚本:sdlm inference.py
注意力实现:支持 sdpa、eager 或 flex attn,建议使用 sdpa 以快速启动
块大小:当前设置为4,也可使用8,更大块大小仍在探索中
因果注意力:当前设置为非因果(False)
基本用法 安装依赖项 下载模型推理脚本 sdlm inference.py 到工作目录 使用 transformers 库运行 SDLM-32B-D4 限制 块大小和注意力配置仍在探索和优化中。使用 Flex Attention 需要额外配置。
License 请参考项目 GitHub 仓库获取完整的许可证信息。
优先采用原作者提供的中文模型卡片;仅有英文说明时由闲社AI翻译整理。重要参数、许可证和商用范围请以原文为准。
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