SGLang v0.5.19 release: new models and beam search

Melvin Vivas · X post · 2026-09-10 · Open on X

Topics: LLMOps, Deployment & Monitoring, Industry Trends & Job Market · Level: intermediate

Summary

Announces SGLang v0.5.19, an open-source LLM serving and inference engine. The release has 786 PRs from 214 contributors, 51 of them new. It adds support for several new open models plus LongCat-Image-Edit on SGLang-Diffusion, and the quoted post says beam search has been updated.

Key points

• SGLang v0.5.19 has 786 PRs from 214 contributors, 51 of them first-time contributors.
• New model support: Qwen3.8 and Qwen3.8-27B, dots3.note, Ling-3.0-flash, Ling-3.0-tiny, Spark2.5 and Granite 4.2.
• SGLang-Diffusion now supports LongCat-Image-Edit for image editing.
• The quoted post says beam search has changed, but the text is cut off before the details.
• SGLang is an option for self-hosting open-weight models in production, like other serving engines.

Resources mentioned

• SGLang · repo · github.com · free
  Open-source, high-performance serving engine for running LLMs and multimodal models.
• SGLang-Diffusion · tool · docs.sglang.io · free
  SGLang's add-on for serving diffusion and image-generation models.
• Qwen3.8 · tool · qwen.ai · free
  Upcoming large Qwen model (2.4T parameters) that Qwen says will be released with open weights.
  Also in: Qwen3.8-Max on the Frontend Code Arena cost-performance frontier (Melvin Vivas on X · notes), Qwen3.8-Max announced with open weights for Max and 27B (Melvin Vivas on X · notes), Qwen3.8 (2.4T params) Announced as Upcoming Open-Weight Model (Melvin Vivas on X · notes), Qwen3.8 Open-Weight Launch Announcement Reaction (Melvin Vivas on X · notes)
• Granite 4.2 · tool · research.ibm.com · free
  IBM's open Granite language model.
• Ling-3.0-flash / Ling-3.0-tiny · tool · huggingface.co · free
  Ling 3.0 family of open language models in flash and tiny sizes.
• dots3.note · tool · huggingface.co · free
  Open model newly supported in SGLang.
• Spark2.5 · tool · check price
  Model newly supported in SGLang.
• LongCat-Image-Edit · tool · github.com · free
  Image-editing diffusion model served through SGLang-Diffusion.

Try this

• Upgrade to SGLang v0.5.19 to serve the newly supported models.