--- title: Claude Opus 5 Is Most Efficient at Medium Effort:... description: FrontierCode v1.1 benchmark data shows Claude Opus 5 at medium reasoning effort achieves peak coding performance (53.4% main set, 63.6% extended set) at... canonical: https://daily.dev/posts/claude-opus-5-is-most-efficient-at-medium-effort-frontiercode-benchmark-data-explained-rufc1byxf twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Claude Opus 5 Is Most Efficient at Medium Effort: FrontierCode Benchmark Data Explained | daily.dev og:description: FrontierCode v1.1 benchmark data shows Claude Opus 5 at medium reasoning effort achieves peak coding performance (53.4% main set, 63.6% extended set) at... og:url: https://daily.dev/posts/claude-opus-5-is-most-efficient-at-medium-effort-frontiercode-benchmark-data-explained-rufc1byxf og:image: https://api.daily.dev/og/posts/rUFC1bYxf.png og:image:alt: Claude Opus 5 Is Most Efficient at Medium Effort: FrontierCode Benchmark Data Explained og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Claude Opus 5 Is Most Efficient at Medium Effort: FrontierCode Benchmark Data Explained **[SitePoint](https://daily.dev/sources/sitepoint)** · 12 min read · 0 upvotes · 0 comments ## Summary FrontierCode v1.1 benchmark data shows Claude Opus 5 at medium reasoning effort achieves peak coding performance (53.4% main set, 63.6% extended set) at roughly 1.5x baseline compute, while high effort yields no meaningful accuracy gain at ~3x compute cost. The analysis compares Opus 5 against Claude Fable 5 and GPT-5.6 Sol across effort levels, finding Opus 5 medium sits at the inflection point of a diminishing-returns curve. Practical guidance recommends medium effort as the default for most coding tasks, with selective escalation to high effort only for complex multi-file or ambiguous work. Notably, the article includes significant caveats: the benchmark methodology is unverified, and the models 'Claude Fable 5' and 'GPT-5.6 Sol' are not confirmed in public model listings. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [GPT-5.4 vs Claude Opus 4.6: a guide to choosing the right model](https://daily.dev/posts/gpt-5-4-vs-claude-opus-4-6-a-guide-to-choosing-the-right-model-bhtobehwf) · portkey · 1 upvotes · 0 comments - [Anthropic’s Opus 5 is almost Fable 5](https://daily.dev/posts/anthropic-s-opus-5-is-almost-fable-5-vlen80a1c) · The New Stack · 9 upvotes · 2 comments --- Tags: [#ai](https://daily.dev/tags/ai), [#ai-coding](https://daily.dev/tags/ai-coding), [#claude](https://daily.dev/tags/claude) [View this post on daily.dev](https://daily.dev/posts/claude-opus-5-is-most-efficient-at-medium-effort-frontiercode-benchmark-data-explained-rufc1byxf) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Claude Opus 5 Is Most Efficient at Medium Effort: FrontierCode Benchmark Data Explained","url":"https://daily.dev/posts/claude-opus-5-is-most-efficient-at-medium-effort-frontiercode-benchmark-data-explained-rufc1byxf","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/claude-opus-5-is-most-efficient-at-medium-effort-frontiercode-benchmark-data-explained-rufc1byxf"},"datePublished":"2026-07-24T23:02:44.677Z","dateModified":"2026-07-25T00:15:00.103Z","description":"FrontierCode v1.1 benchmark data shows Claude Opus 5 at medium reasoning effort achieves peak coding performance (53.4% main set, 63.6% extended set) at...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/0e44729f4ac77e09b7fcb4b889c55ff5?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/0e44729f4ac77e09b7fcb4b889c55ff5?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"SitePoint","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"SitePoint","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/sitepoint","url":"https://daily.dev/sources/sitepoint"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/claude-opus-5-is-most-efficient-at-medium-effort-frontiercode-benchmark-data-explained-rufc1byxf","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"ai,ai-coding,claude","timeRequired":"PT12M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"SitePoint","item":"https://daily.dev/sources/sitepoint"},{"@type":"ListItem","position":3,"name":"Claude Opus 5 Is Most Efficient at Medium Effort: FrontierCode Benchmark Data Explained"}]} ```