{"type":"post","id":"nathan-barry-reports-that-a-linear-program-can-6a8a22","slug":"nathan-barry-reports-that-a-linear-program-can-6a8a22","title":"Nathan Barry reports that a linear program can reproduce much of GPT-6 Astra’s edit to Qwen3.5-0.8B","description":"Nathan Barry reports that a linear program can reproduce much of GPT-6 Astra’s edit to Qwen3.5-0.8B, which reduced repetitive reasoning loops, while changing roughly eight times fewer weights.","retrieval_nugget":"Nathan Barry reports that a linear program can reproduce much of GPT-6 Astra’s edit to Qwen3.5-0.8B, which reduced repetitive reasoning loops, while changing roughly eight times fewer weights. The result reframes the experiment as a low-rank steering problem, but it remains a single-model finding rather than a general weight-editing method.","published_at":"2026-11-10","updated_at":"2026-11-10","record_date":"2026-11-10","date_kind":"published_at","topics":["models","open-models"],"entities":["Nathan Barry","GPT-6 Astra","Qwen3.5-0.8B","MIT CSAIL","HiGHS","PDHG"],"related_patterns":["harness-architecture-outlives-model-choice"],"novelty_label":"new_fact","what_changed":"A follow-up analysis says linear-program optimization could reproduce Astra’s loop-fixing edit in about a minute, changing eight times fewer weights while improving math and instruction-following scores.","prior_refs":[],"source_url":"https://nathan.rs/posts/weight-space-lp","source_urls":["https://nathan.rs/posts/weight-space-lp"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:nathan-barry-reports-that-a-linear-program-can-6a8a22","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/nathan-barry-reports-that-a-linear-program-can-6a8a22/","markdown":"https://newruntime.com/posts/nathan-barry-reports-that-a-linear-program-can-6a8a22.md","json":"https://newruntime.com/posts/nathan-barry-reports-that-a-linear-program-can-6a8a22.json"},"markdown_url":"https://newruntime.com/posts/nathan-barry-reports-that-a-linear-program-can-6a8a22.md","next_reads":[{"type":"topic","path":"/topics/models/","url":"https://newruntime.com/topics/models/","title":"Models","reason":"Explore the models topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/models.md","json_url":"https://newruntime.com/topics/models.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"}]}