[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"branding":3,"analytics":7,"article-o3-mini-thinks-harder-not-longer":10,"sections":40},{"siteName":4,"siteTagline":5,"publisherName":4,"contactEmail":6},"The Revision","Tech news, decoded.","editor@therevision.news",{"gaMeasurementId":8,"adsenseClientId":9},"G-ZW2MV82GYR","ca-pub-8533917693782264",{"article":11},{"id":12,"slug":13,"title":14,"dek":15,"body_md":16,"tags_json":17,"published_at":18,"created_at":19,"updated_at":20,"status":21,"review_note":22,"review_notes":23,"image_url":22,"persona_id":22,"persona_name":22,"section":30,"tags":31,"sources":35,"feedback":39,"feedback_at":22,"cost_usd":39,"total_tokens":39},4417,"o3-mini-thinks-harder-not-longer","o3-mini Thinks Harder, Not Longer","A new study (arXiv 2502.15631) finds o3-mini hits superior accuracy on Omni-MATH without writing longer reasoning chains than its predecessor.","OpenAI's o3-mini beats its predecessor on a hard math benchmark without rambling longer to get there.\n\nResearchers systematically compared reasoning chain lengths across o1-mini and o3-mini variants on the Omni-MATH benchmark. The headline finding: o3-mini (m) achieves superior accuracy without requiring longer reasoning chains than o1-mini. The paper also surfaces a counterintuitive pattern — across all tested models and compute settings, accuracy generally *declines* as reasoning chains grow longer, even after controlling for question difficulty. Newer models show a smaller drop, suggesting they're spending test-time compute more wisely rather than just more abundantly.\n\nThis matters because the dominant assumption in scaling circles has been that more thinking tokens equal better answers. If that relationship is weaker than believed, it reshapes how labs should evaluate and price reasoning models — and raises questions about whether throwing more compute at a problem is ever the right call past a certain point.\n\nThe paper also notes that o3-mini (h) — the high-compute variant — ekes out only a marginal accuracy gain over o3-mini (m) while burning substantially more reasoning tokens on every problem, including ones the medium variant already solves correctly. That's not efficiency; that's overhead dressed up as rigor.","[\"ai\",\"large language models\",\"reasoning\",\"benchmarks\"]","2026-07-08T04:00:00.000Z","2026-07-08T08:49:37.681Z","2026-07-08T08:49:40.479Z","published",null,[24],{"id":25,"reviewer":26,"round":27,"reason":28,"status":29},"editor-r1","editor",1,"The headline says 'Thinks Smarter, Not Longer' but the source title says 'thinks harder, not longer' — update the headline to match the source's phrasing, and the dek claims o3-mini 'matches or beats' o1-mini but the source only establishes o3-mini (m) achieves 'superior accuracy,' so remove the hedged 'matches' claim; additionally, the article lacks author attribution and the arXiv paper ID (2502.15631) should be cited so the piece is independently verifiable.","resolved","ai",[30,32,33,34],"large language models","reasoning","benchmarks",[36],{"name":37,"url":38},"arXiv cs.AI","https:\u002F\u002Farxiv.org\u002Fabs\u002F2502.15631",0,{"sections":41},[42,46,51,56,61,66,71,76,81,86,91,95,100,105],{"name":43,"slug":30,"count":44,"latest_published_at":45},"AI",2590,"2026-07-16T04:00:00.000Z",{"name":47,"slug":48,"count":49,"latest_published_at":50},"Security","security",294,"2026-07-15T19:59:48.000Z",{"name":52,"slug":53,"count":54,"latest_published_at":55},"Deals","deals",179,"2026-06-29T20:02:07.000Z",{"name":57,"slug":58,"count":59,"latest_published_at":60},"Policy","policy",158,"2026-07-16T00:02:48.000Z",{"name":62,"slug":63,"count":64,"latest_published_at":65},"Hardware","hardware",122,"2026-07-14T19:46:26.000Z",{"name":67,"slug":68,"count":69,"latest_published_at":70},"Consumer Tech","consumer-tech",93,"2026-07-13T13:20:48.000Z",{"name":72,"slug":73,"count":74,"latest_published_at":75},"Software","software",70,"2026-07-13T19:52:25.000Z",{"name":77,"slug":78,"count":79,"latest_published_at":80},"Science","science",66,"2026-07-10T10:29:37.000Z",{"name":82,"slug":83,"count":84,"latest_published_at":85},"Dev Tools","dev-tools",59,"2026-07-07T04:00:00.000Z",{"name":87,"slug":88,"count":89,"latest_published_at":90},"Gaming","gaming",41,"2026-07-09T04:00:00.000Z",{"name":92,"slug":93,"count":89,"latest_published_at":94},"Startups","startups","2026-06-29T20:55:50.000Z",{"name":96,"slug":97,"count":98,"latest_published_at":99},"General","general",29,"2026-07-10T22:28:58.000Z",{"name":101,"slug":102,"count":103,"latest_published_at":104},"Reviews","reviews",20,"2026-06-24T12:00:01.000Z",{"name":106,"slug":107,"count":108,"latest_published_at":109},"How-To","how-to",6,"2026-06-16T09:00:00.000Z"]