{"type":"post","id":"zyphra-introduces-zha-a-hierarchical-sparse-attention-with-967a3d","slug":"zyphra-introduces-zha-a-hierarchical-sparse-attention-with-967a3d","title":"Zyphra introduces ZHA, a hierarchical sparse attention with subquadratic cost that can be distilled into existing models","description":"Zyphra introduced Zyphra Hierarchical Attention (ZHA), a sparse-attention method that searches a tree of compressed key summaries instead of indexing every token in a long context.","retrieval_nugget":"Zyphra introduced Zyphra Hierarchical Attention (ZHA), a sparse-attention method that searches a tree of compressed key summaries instead of indexing every token in a long context. Its reported benchmarks suggest that existing pretrained models can retain strong task performance while attending to a small share of decode keys, but the headline speedups remain modeled rather than demonstrated with optimized kernels.","published_at":"2026-11-03","updated_at":"2026-11-03","record_date":"2026-11-03","date_kind":"published_at","topics":["agent-economics"],"entities":["Zyphra","Zyphra Hierarchical Attention","Qwen 3.6 35B MoE"],"related_patterns":["agent-economics-moves-to-completed-work"],"novelty_label":"new_fact","what_changed":"Zyphra introduces ZHA, a distinct tree-routed sparse attention method with subquadratic cost and distillation into pretrained models.","prior_refs":["https://newruntime.com/posts/proxyattn-a-training-free-method-from-researchers-at-59312c/","https://newruntime.com/posts/this-ai-lab-takes-on-jev-with-12x-0746e5/"],"source_url":"https://zyphra.com/our-work/zyphra-hierarchical-attention","source_urls":["https://zyphra.com/our-work/zyphra-hierarchical-attention"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:zyphra-introduces-zha-a-hierarchical-sparse-attention-with-967a3d","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/zyphra-introduces-zha-a-hierarchical-sparse-attention-with-967a3d/","markdown":"https://newruntime.com/posts/zyphra-introduces-zha-a-hierarchical-sparse-attention-with-967a3d.md","json":"https://newruntime.com/posts/zyphra-introduces-zha-a-hierarchical-sparse-attention-with-967a3d.json"},"markdown_url":"https://newruntime.com/posts/zyphra-introduces-zha-a-hierarchical-sparse-attention-with-967a3d.md","next_reads":[{"type":"topic","path":"/topics/agent-economics/","url":"https://newruntime.com/topics/agent-economics/","title":"Agent Economics","reason":"Explore the agent-economics topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/agent-economics.md","json_url":"https://newruntime.com/topics/agent-economics.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"}]}