# LMSYS says SGLang matches DeepInfer on DeepSeek-V4.1-Flash prefill and decode throughput

> Original title: DeepSeek raised the bar, and SGLang pushed it even further 🧡

- Source: LMSYS Org
- Published: 2026-10-24T19:44:36.000Z
- Bad Influence: https://badinfluence.news/items/df2exdih1owtyi5l3q3vxwczr
- Original: https://x.com/lmsysorg/status/2114080639381320028

## Summary

LMSYS Org says SGLang matches DeepInfer on both prefill and decode for DeepSeek-V4.1-Flash. It reports up to 1.04× prefill throughput on 4× GB300 and 4× B300, and up to 7.4% decode throughput on 64× GB300. The post also links an end-to-end reproduction guide and a production serving stack.

## Post

DeepSeek raised the bar, and SGLang pushed it even further 🧡

https://lmsys.org/blog/2026-10-24-dsv41-deepinfer

Read our blog to learn more about the performance results, engineering optimizations, and how SGLang brings it all together in a production-ready serving stack!

## Quoted post @sgl_project

> DeepInfer set the bar. SGLang pushed it higher! 🚀
> 
> SGLang now matches DeepInfer performance on BOTH prefill and decode:
> 
> • Prefill: Up to 1.04× throughput on 4× GB300 and 4× B300
> • Decode: Up to 7.4% throughput on 64× GB300
> 
> We also provide an end-to-end reproduction guide and a full serving stack to run it in production.

https://x.com/sgl_project/status/2114071115605877043