Linum开源低成本文生图模型Pyramid-JiT
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2026年11月6日，Linum开源了2B参数的像素空间文本生成图像模型Pyramid-JiT，并以Apache 2.0协议开放权重。据报道，该模型的全流程训练成本仅约21,038美元。在技术架构上，Pyramid-JiT彻底舍弃了传统VAE，采用32×32的token压缩将注意力上下文窗口缩减4倍，并结合多分辨率中间读出头以加速网络收敛。
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- Buzzing HN · 中文精选SelectedLinum open-sources 2B text-to-image model Pyramid-JiT, costing roughly $21,000 to train
Linum has open-sourced Pyramid-JiT, a 2B-parameter pixel-space text-to-image model, releasing its weights under the Apache 2.0 license with an end-to-end training cost of just about $21,038. Completely ditching traditional VAEs, the model employs 32×32 token compression to reduce the attention context window by 4x and incorporates multi-resolution intermediate readout heads to accelerate network convergence.
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