{"type":"post","id":"muse-spark-open-ultrafast-pushing-beyond-1-000-fe17eb","slug":"muse-spark-open-ultrafast-pushing-beyond-1-000-fe17eb","title":"Muse Spark Open Ultrafast: Pushing beyond 1,000 Tokens per second","description":"LMSYS says a custom CUDA/PTX megakernel raised Muse Spark Open decoding speed from 517 to 1,109 tokens per second on eight NVIDIA GB300 GPUs in a single-request GSM8K test.","retrieval_nugget":"LMSYS says a custom CUDA/PTX megakernel raised Muse Spark Open decoding speed from 517 to 1,109 tokens per second on eight NVIDIA GB300 GPUs in a single-request GSM8K test. The result shows how reducing launch, synchronization and data-wait overhead can matter alongside model and hardware choices, while the implementation remains specialized and limited to batch size one.","published_at":"2026-11-11","updated_at":"2026-11-11","record_date":"2026-11-11","date_kind":"published_at","topics":["inference","open-models"],"entities":["LMSYS","SGLang","Muse Spark Open","DFlash V2","NVIDIA GB300"],"related_patterns":["harness-architecture-outlives-model-choice"],"novelty_label":"new_fact","what_changed":"LMSYS reports a new megakernel implementation for Muse Spark Open that raises decoding speed from 517 to 1,109 tokens per second on Blackwell GPUs.","prior_refs":[],"source_url":"http://lmsys.org/blog/2026-11-05-muse-spark-open-ultrafast","source_urls":["http://lmsys.org/blog/2026-11-05-muse-spark-open-ultrafast"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:muse-spark-open-ultrafast-pushing-beyond-1-000-fe17eb","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/muse-spark-open-ultrafast-pushing-beyond-1-000-fe17eb/","markdown":"https://newruntime.com/posts/muse-spark-open-ultrafast-pushing-beyond-1-000-fe17eb.md","json":"https://newruntime.com/posts/muse-spark-open-ultrafast-pushing-beyond-1-000-fe17eb.json"},"markdown_url":"https://newruntime.com/posts/muse-spark-open-ultrafast-pushing-beyond-1-000-fe17eb.md","next_reads":[{"type":"topic","path":"/topics/inference/","url":"https://newruntime.com/topics/inference/","title":"Inference","reason":"Explore the inference topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/inference.md","json_url":"https://newruntime.com/topics/inference.json"},{"type":"topic","path":"/topics/open-models/","url":"https://newruntime.com/topics/open-models/","title":"Open Models","reason":"Explore the open-models topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/open-models.md","json_url":"https://newruntime.com/topics/open-models.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/sources/","url":"https://newruntime.com/sources/","title":"Sources","reason":"See the original sources this archive cites.","media_type":"text/html"}]}