reap

REAP: Router-weighted Expert Activation Pruning for SMoE compression (by CerebrasResearch)

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  • Qwen3.8-Max: A New Bar for Coding and Cowork
    5 projects | news.ycombinator.com | 3 Aug 2026
    Linking here since the pruning method you're talking about wasn't the top search result when I looked: https://github.com/CerebrasResearch/reap
  • DeepSeek V4 Flash optimized framework+model variants for DGX Spark
    3 projects | news.ycombinator.com | 22 Jun 2026
    Inspired by [https://github.com/antirez/ds4](ds4), [https://github.com/CerebrasResearch/reap](REAP) and [https://huggingface.co/0xSero/DeepSeek-V4-Flash-162B](OxSero's Deepseek v4 reap) I wanted to push and see how much performance can be extracted from a single DGX Spark. It should also work day one (hopefully) on the upcoming Spark devices.

    I made three versions, one with 128 experts kept, one with 150 and the biggest (borderline fitting one) with 180 experts out of 256. Experts kept are based around coding / agentic / research workloads.

    Goal is to have a higher-precision (NVFP4) option to run the model, the original full ds4 already runs the IQ2XXS version. Custom CUDA kernels are written to try and best align the NVFP4 models to the Spark.

    The K180 runs at around 119/122GB ram usage at the full 1M context, tested up to 32k prefill and was stable. For best memory efficiency, you might need DS4_CUDA_MANAGED_MODEL=1 DS4_KV_TURBO=1. More memory/bandwidth optimizations are coming, after that I plan on tackling re-adjusting the MTP heads (which would require re-training them on the new architectures).

    Benchmarking hasn't been done yet, as I have mostly been busy with the CUDA. Treat as experimental.

    Model links:

Stats

Basic reap repo stats
2
474
4.6
4 months ago

CerebrasResearch/reap is an open source project licensed under Apache License 2.0 which is an OSI approved license.

The primary programming language of reap is Python.


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