--- title: Introducing Claude Opus 5 | daily.dev description: Anthropic has released Claude Opus 5, a new AI model positioned between Claude Pro and Fable 5 in capability, at half the price of Fable 5. It sets new... canonical: https://daily.dev/posts/introducing-claude-opus-5-fbmlp4od7 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Introducing Claude Opus 5 | daily.dev og:description: Anthropic has released Claude Opus 5, a new AI model positioned between Claude Pro and Fable 5 in capability, at half the price of Fable 5. It sets new... og:url: https://daily.dev/posts/introducing-claude-opus-5-fbmlp4od7 og:image: https://api.daily.dev/og/posts/Fbmlp4Od7.png og:image:alt: Introducing Claude Opus 5 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. # Introducing Claude Opus 5 **[Andrew M](https://daily.dev/sources/dup6ye036hupdshygexyu)** · [@andrewma](https://daily.dev/andrewma) · 3 min read · 6 upvotes · 4 comments ## Summary Anthropic has released Claude Opus 5, a new AI model positioned between Claude Pro and Fable 5 in capability, at half the price of Fable 5. It sets new state-of-the-art results on Frontier-Bench and GDPval-AA coding and knowledge work evaluations, and more than doubles Opus 4.8's performance at lower cost. On ARC-AGI 3, it scores three times higher than the next-best model. It also leads on Zapier AutomationBench and OSWorld 2.0 computer use benchmarks. Scientific research capabilities are improved, particularly in organic chemistry and protein-related tasks. Opus 5 is now the default model on Claude Max and the strongest model on Claude Pro. ## Content Claude Opus 5 is available today. It’s a thoughtful and proactive model that comes close to the frontier intelligence of Claude Fable 5 at half the price. On coding and knowledge work evaluations like [Frontier-Bench](https://www.frontierbench.ai/) and [GDPval-AA](https://artificialanalysis.ai/evaluations/gdpval-aa), Opus 5 is the new state-of-the-art, though it remains behind Mythos 5 on cybersecurity tasks. Opus 5 is designed to be used every day: it works more efficiently than other models. It’s the new default model on Claude Max, and the strongest model on Claude Pro.  ## **Performance and cost-effectiveness** Claude Opus 5 provides greatly improved performance for the same cost as its predecessor, Opus 4.8. The charts in this section show how performance changes according to the model’s effort setting, which customers can use to optimize for intelligence or conserve tokens for faster and cheaper results. Opus 5 excels on valuable software engineering tasks. For example, on **Frontier-Bench v0.1, **Opus 5 surpasses all other models, and more than doubles Opus 4.8’s performance at a lower cost per task. On **CursorBench 3.2**, at max effort, the model performs within 0.5% of Fable 5’s peak score, but at half the cost per task; it also achieves greater performance at a given cost than all other models on high, xhigh, and max effort.    We see similar results on knowledge work and problem-solving tasks. For example: - On **ARC-AGI 3**, an evaluation where the model has to solve novel problems, Opus 5’s score is three times as high as the next-best model. - On **Zapier AutomationBench**, which measures whether models can complete business tasks from start to finish, Opus 5’s pass rate is around 1.5× the next-best model for the same cost per task. Even at its lowest effort setting, Opus 5 passes more tasks than any other model. - On **OSWorld 2.0**, a computer use benchmark, Opus 5 outperforms every other model at any given cost, surpassing Fable 5’s best result at just over a third of the cost. It’s also our best and most cost-efficient model on several related evaluations:  Opus 5 is a meaningful improvement over Opus 4.8 for scientific research. It shows better performance than Opus 4.8 on every one of our life sciences evaluations, which cover topics including structural biology, organic chemistry, and bioinformatics. Its improvements are most notable on organic chemistry tasks, like inferring molecular structures from spectroscopy data (it scores 10.2 percentage points higher than Opus 4.8 on our internal benchmark), and on protein-related tasks like predicting how variations in a protein’s sequence affect how it functions (here, it scores 7.7 percentage points higher). Finally, Opus 5 is capable of producing much stronger visual outputs! ## Community discussion Top comments from developers on daily.dev. **@agustinbarrientos** · 1 upvotes > What has been your experience with it? **@allinonetools** · 1 upvotes > The efficiency improvements caught my attention more than the raw scores. Looking forward to testing it. **@ilijaveselinovic** · 0 upvotes > I'm still using fable 5 in combination with sonnet for some tasks, but I will try opus 5. Thanks --- Tags: [#ai](https://daily.dev/tags/ai), [#llm](https://daily.dev/tags/llm), [#ai-coding](https://daily.dev/tags/ai-coding), [#claude](https://daily.dev/tags/claude), [#anthropic](https://daily.dev/tags/anthropic) [View this post on daily.dev](https://daily.dev/posts/introducing-claude-opus-5-fbmlp4od7) ```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":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/introducing-claude-opus-5-fbmlp4od7","headline":"Introducing Claude Opus 5","text":"Anthropic has released Claude Opus 5, a new AI model positioned between Claude Pro and Fable 5 in capability, at half the price of Fable 5. It sets new state-of-the-art results on Frontier-Bench and GDPval-AA coding and knowledge work evaluations, and more than doubles Opus 4.8's performance at lower cost. On ARC-AGI 3, it scores three times higher than the next-best model. It also leads on Zapier AutomationBench and OSWorld 2.0 computer use benchmarks. Scientific research capabilities are improved, particularly in organic chemistry and protein-related tasks. 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Looking forward to testing it.","datePublished":"2026-07-29T02:46:42.599Z","url":"https://daily.dev/posts/Fbmlp4Od7#c-dhc14bwQ7","author":{"@type":"Person","name":"AllInOneTools","url":"https://daily.dev/allinonetools","image":"https://media.daily.dev/image/upload/s--4ZT8QlF0--/f_auto/v1769790028/avatars/avatar_igzBsWloJeaegzm9bQltZ?_a=BAMAMiiu0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}},{"@type":"Comment","text":"I’m still using fable 5 in combination with sonnet for some tasks, but I will try opus 5. Thanks","datePublished":"2026-07-29T11:23:41.313Z","url":"https://daily.dev/posts/Fbmlp4Od7#c-1sj1qiI4f","author":{"@type":"Person","name":"Ilija","url":"https://daily.dev/ilijaveselinovic","image":"https://media.daily.dev/image/upload/s--GqTPoTzA--/f_auto/v1738848590/avatars/avatar_Nes9qpxMjBg8ZBR90Du7C"}}],"isPartOf":{"@type":"WebPage","url":"https://daily.dev/sources/dup6ye036hupdshygexyu","name":"Andrew M"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Andrew M","item":"https://daily.dev/sources/dup6ye036hupdshygexyu"},{"@type":"ListItem","position":3,"name":"Introducing Claude Opus 5"}]} ```