--- title: Opus 5 (Fully Tested): A MID-MODEL for a BIG PRICE that... description: Claude Opus 5 has been released as Anthropic's new mid-tier flagship, priced at $5/$25 per million input/output tokens — the same as Opus 4.8 and half of Fable... canonical: https://daily.dev/posts/opus-5-fully-tested-a-mid-model-for-a-big-price-that-still-underperforms-k3--6hbfsimgp twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Opus 5 (Fully Tested): A MID-MODEL for a BIG PRICE that still UNDERPERFORMS K3?! | daily.dev og:description: Claude Opus 5 has been released as Anthropic's new mid-tier flagship, priced at $5/$25 per million input/output tokens — the same as Opus 4.8 and half of Fable... og:url: https://daily.dev/posts/opus-5-fully-tested-a-mid-model-for-a-big-price-that-still-underperforms-k3--6hbfsimgp og:image: https://api.daily.dev/og/posts/6hBfSimGP.png og:image:alt: Opus 5 (Fully Tested): A MID-MODEL for a BIG PRICE that still UNDERPERFORMS K3?! 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. # Opus 5 (Fully Tested): A MID-MODEL for a BIG PRICE that still UNDERPERFORMS K3?! **[AICodeKing](https://daily.dev/sources/aicodeking)** · 11 min read · 0 upvotes · 0 comments ## Summary Claude Opus 5 has been released as Anthropic's new mid-tier flagship, priced at $5/$25 per million input/output tokens — the same as Opus 4.8 and half of Fable 5. Official benchmarks show impressive gains on software engineering and agentic tasks, but independent testing on KingBench tells a different story. Opus 5 scores 77.5% (62/80), tying with Kimmy K3 and actually falling below its predecessor Opus 4.8 (80%) and Fable 5 (82.5%). Strengths are clear in logic, reasoning, math, and long-horizon agentic tasks — the fine-tuning task was the best generation ever seen on that question. However, visual and 3D generation regressed, with the folding table dropping from 8 to 5. Real-world usage reveals the model is extremely verbose, burning unnecessary tokens, and general knowledge/multimodal capabilities feel weaker than Fable 5 or GPT-5.6. The verdict: a solid agentic workhorse at a reasonable price, but not the Fable 5 beater Anthropic's marketing claims. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [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), [#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/opus-5-fully-tested-a-mid-model-for-a-big-price-that-still-underperforms-k3--6hbfsimgp) ```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":"Opus 5 (Fully Tested): A MID-MODEL for a BIG PRICE that still UNDERPERFORMS K3?!","url":"https://daily.dev/posts/opus-5-fully-tested-a-mid-model-for-a-big-price-that-still-underperforms-k3--6hbfsimgp","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/opus-5-fully-tested-a-mid-model-for-a-big-price-that-still-underperforms-k3--6hbfsimgp"},"datePublished":"2026-07-25T11:01:41.500Z","dateModified":"2026-07-25T11:02:38.046Z","description":"Claude Opus 5 has been released as Anthropic's new mid-tier flagship, priced at $5/$25 per million input/output tokens — the same as Opus 4.8 and half of Fable...","image":"https://i.ytimg.com/vi/dRWu1bvyx10/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/dRWu1bvyx10/sddefault.jpg","isAccessibleForFree":true,"articleSection":"AICodeKing","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":"AICodeKing","logo":"https://media.daily.dev/image/upload/s--x7nDUfWj--/f_auto,q_auto/v1768208312/logos/aicodeking","url":"https://daily.dev/sources/aicodeking"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/opus-5-fully-tested-a-mid-model-for-a-big-price-that-still-underperforms-k3--6hbfsimgp","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"ai,llm,ai-coding,claude,anthropic","timeRequired":"PT11M","video":{"@type":"VideoObject","name":"Opus 5 (Fully Tested): A MID-MODEL for a BIG PRICE that still UNDERPERFORMS K3?!","description":"Claude Opus 5 has been released as Anthropic's new mid-tier flagship, priced at $5/$25 per million input/output tokens — the same as Opus 4.8 and half of Fable...","thumbnailUrl":"https://i.ytimg.com/vi/dRWu1bvyx10/sddefault.jpg","uploadDate":"2026-07-25T11:01:41.500Z","duration":"PT11M","url":"https://api.daily.dev/r/6hBfSimGP","embedUrl":"https://www.youtube.com/embed/dRWu1bvyx10"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"AICodeKing","item":"https://daily.dev/sources/aicodeking"},{"@type":"ListItem","position":3,"name":"Opus 5 (Fully Tested): A MID-MODEL for a BIG PRICE that still UNDERPERFORMS K3?!"}]} ```