据硅基流动消息，腾讯混元新一代开源模型Hy4 preview已在硅基流动平台上线，支持1M上下文长度，调用价格为缓存命中0.3元/M tokens、输入6元/M tokens、输出18元/M tokens。该模型在AI社区获得广泛好评，被视为腾讯回归开源大模型第一梯队的标志。
Hy4 preview专为生产力场景打造，在代码、办公、科学等真实任务上表现突出。相较前代模型，它在模型尺寸、上下文长度、数据规模上均有显著扩展，并通过预训练与后训练协同优化提升智能水平。据混元官方数据，在Terminal Bench 2.1、PostTrainBench等基准测评中，部分指标达到Claude Opus 5的水平。
该模型依托腾讯内部专家真实工作经验构建训练数据，覆盖软件工程、开发、金融分析、安全等多个专业领域，并与CodeBuddy、WorkBuddy等产品深度协同，持续优化真实工作流体验。在混元组织的内部专家盲测中，163名专家评测了203个工程任务，Hy4 preview平均得分2.99（满分4分），表现略优于同期主流开源模型。
在WorkBuddy的实际体验中，测试者通过硅基流动API接入Hy4 preview，将近一千笔订单、退款流水、不同版本成本表和往来邮件交给模型，追查“销售额涨了，利润为何下降”的业务问题。Hy4 preview首先梳理数据结构和冲突，厘清从下单、收入到实际到账的关键口径，最终定位利润变化根源，并围绕下一轮百万元预算交付Excel分析表、Word复盘报告和汇报PPT，同时列出数据来源与待核实事项，使零散资料转化为可追溯、可复算、可落地的业务洞见。
这是硅基流动上线的第172款模型。Claude Code、Codex、WorkBuddy、CodeBuddy、Cursor、TRAE、OpenCode、Cline、Roo Code等主流工具均可接入硅基流动API调用Hy4 preview。硅基流动致力于成为用户首选的“Token工厂”，提供大模型云服务、专属实例及AI算力运营服务，已上架Qwen、GLM、DeepSeek、Kimi等百款热门模型，覆盖语言、图像、音频、视频、嵌入与重排序全任务场景。新用户可获得16元/1美元赠金体验平台所有模型，多款模型免费。
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According to Silicon Flow, the new generation of Tencent's open-source model, Hy4 preview, has been launched on the Silicon Flow platform. It supports a context length of 1 million tokens, with pricing at 0.3 RMB per million tokens for cache hits, 6 RMB per million tokens for input, and 18 RMB per million tokens for output. The model has received widespread acclaim in the AI community, marking a return by Tencent to the first tier of open-source large models.
Hy4 preview is specifically designed for productivity scenarios, showing exceptional performance in real-world tasks such as coding, office work, and scientific research. Compared to its predecessor, it features significant expansions in model size, context length, and data volume. Through collaborative optimization between pre-training and post-training, it has advanced its level of intelligence. Official benchmarks from Tencent show that some indicators in Terminal Bench 2.1 and PostTrainBench are on par with Claude Opus 5.
The model's training data is built on the real work experiences of Tencent's internal experts, covering multiple professional domains including software engineering, development, financial analysis, and security. It integrates deeply with products like CodeBuddy and WorkBuddy, continuously optimizing the experience for real-world workflows. In a blind test organized by Tencent with 163 experts, Hy4 preview scored 2.99 out of 4 on average for 203 engineering tasks, slightly outperforming other mainstream open-source models from the same period.
In a practical test using WorkBuddy, a tester connected to Hy4 preview via the Silicon Flow API and provided the model with nearly a thousand order and refund transactions, cost tables across different versions, and emails. The task was to investigate why profits had decreased despite an increase in sales. Hy4 preview first organized the data structure and resolved conflicts, clarifying the key metrics from order placement to revenue and actual receipt. It then identified the root cause of the profit change and produced deliverables including an Excel analysis table, a Word retrospective report, and a PowerPoint presentation for the next round of budgeting, all while listing data sources and items pending verification, transforming scattered information into traceable, reproducible business insights.
This is the 172nd model launched by Silicon Flow. Mainstream tools such as Claude Code, Codex, WorkBuddy, CodeBuddy, Cursor, TRAE, OpenCode, Cline, and Roo Code can all connect to the Silicon Flow API to utilize Hy4 preview. Silicon Flow is committed to becoming the user's first-choice "token factory," providing cloud services for large models, dedicated instances, and AI computing power operation services. It has already onboarded popular models like Qwen, GLM, DeepSeek, and Kimi, covering full task scenarios including language, images, audio, video, embedding, and re-ranking. New users receive a gift of 16 RMB (approx. 1 USD) to experience all models on the platform, with many models available for free.