--- title: Claude Opus 5 on GitLab: Reasoning built for the hard tasks description: Anthropic's Claude Opus 5 is now available on GitLab Duo Agent Platform, targeting high-complexity engineering tasks. In GitLab's internal benchmarks, Opus 5... canonical: https://daily.dev/posts/claude-opus-5-on-gitlab-reasoning-built-for-the-hard-tasks-rx11fubz0 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Claude Opus 5 on GitLab: Reasoning built for the hard tasks | daily.dev og:description: Anthropic's Claude Opus 5 is now available on GitLab Duo Agent Platform, targeting high-complexity engineering tasks. In GitLab's internal benchmarks, Opus 5... og:url: https://daily.dev/posts/claude-opus-5-on-gitlab-reasoning-built-for-the-hard-tasks-rx11fubz0 og:image: https://api.daily.dev/og/posts/Rx11fubZ0.png og:image:alt: Claude Opus 5 on GitLab: Reasoning built for the hard tasks 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 on GitLab: Reasoning built for the hard tasks **[GitLab](https://daily.dev/sources/gitlab)** · 4 min read · 1 upvotes · 0 comments ## Summary Anthropic's Claude Opus 5 is now available on GitLab Duo Agent Platform, targeting high-complexity engineering tasks. In GitLab's internal benchmarks, Opus 5 achieved a 93.3% task resolution rate, a 20.3-point improvement over Opus 4.8's 73.0%. It completed 100% of attempted tasks and ran 2.2% faster than Opus 4.8 at the 95th percentile. Key capabilities include multi-file refactors, coordinated multi-agent workflows with writer-verifier patterns, and precise code review with low false positives. GitLab Credits usage caps allow cost control for parallel agent workloads. Opus 5 is positioned alongside Sonnet-class models, with guidance to use Opus 5 for the hardest, highest-stakes tasks and Sonnet for routine daily work. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Claude Opus 4.7 is now available in GitLab Duo Agent Platform](https://daily.dev/posts/claude-opus-4-7-is-now-available-in-gitlab-duo-agent-platform-j45qiljbn) · GitLab · 0 upvotes · 0 comments - [Claude Opus 4.6 now available in GitLab Duo Agent Platform](https://daily.dev/posts/claude-opus-4-6-now-available-in-gitlab-duo-agent-platform-luz1vvbar) · GitLab · 3 upvotes · 1 comments --- Tags: [#ai-agents](https://daily.dev/tags/ai-agents), [#claude](https://daily.dev/tags/claude), [#anthropic](https://daily.dev/tags/anthropic), [#code-review](https://daily.dev/tags/code-review), [#gitlab](https://daily.dev/tags/gitlab) [View this post on daily.dev](https://daily.dev/posts/claude-opus-5-on-gitlab-reasoning-built-for-the-hard-tasks-rx11fubz0) ```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 on GitLab: Reasoning built for the hard tasks","url":"https://daily.dev/posts/claude-opus-5-on-gitlab-reasoning-built-for-the-hard-tasks-rx11fubz0","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/claude-opus-5-on-gitlab-reasoning-built-for-the-hard-tasks-rx11fubz0"},"datePublished":"2026-07-27T19:31:29.932Z","dateModified":"2026-07-27T20:18:02.421Z","description":"Anthropic's Claude Opus 5 is now available on GitLab Duo Agent Platform, targeting high-complexity engineering tasks. 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