腾讯混元发布开源旗舰模型Hy4preview，总参数770B、上下文1M
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<div class="ce-paragraph cdx-block ce-paragraph--left"> 腾讯混元8月28日正式发布新一代开源旗舰大模型Hy4preview，总参数770B、激活参数49B，上下文长度1M，定位真实生产力场景。模型已同步开源至HuggingFace、Github、Modelscope等平台，并在腾讯云TokenHub、OpenRouter上线，用户可在WorkBuddy/CodeBuddy、元宝、ima等产品中直接体验。</div>
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<div class="ce-paragraph cdx-block ce-paragraph--left"> 能力层面，Hy4preview依托与腾讯内部软工、游戏、金融、安全等领域专家的高质量数据共建，在四大方向取得进展:软件工程上增强长程开发任务的理解、规划与调试;办公场景可完成从数据分析到文档、表格、演示文稿的完整交付;游戏开发支持通过MCP接入Unreal5与团结引擎，以纯对话从零生成可玩Demo;科研能力覆盖分子动力学、凝聚态物理与基础数学。</div>
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<div class="ce-paragraph cdx-block ce-paragraph--left">内部盲测数据显示，163名专家对203个工程任务的评分中，Hy4preview均分2.99/4.00，略优于GLM-5.3（2.92）与Kimi K3(2.94)。科研突破方面，配合Hyra模型，其将百年经典难题三维Blaschke–Lebesgue问题的体积下界从0.380799推进至0.41104，距Meissner四面体猜想最终证明仅剩约2%差距;在32，512原子磷脂双分子层模拟中实现2.0倍提速，达54.9ms/step。</div>
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<div class="ce-paragraph cdx-block ce-paragraph--left">腾讯表示，Hy4preview为Hy4迭代的早期版本，预训练与后训练仍有提升空间，存在复杂任务长思考等已知问题，将通过敏捷迭代吸收真实反馈。其以开源方式发布早期版本的策略，延续了大模型竞争从参数竞赛转向生产力实效验证的行业趋势。</div>
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