{"slug": "anthropic-debuts-opus-5-at-half-the-price-of-its-fable-sibling", "title": "Anthropic debuts Opus 5 at half the price of its Fable sibling", "summary": "Anthropic has released Opus 5, a new AI model priced at half the cost of its Fable sibling, and the company says it does not require data retention.", "body_md": "### MOST POPULAR\n\n[AI](https://beta.theregister.com/tag/ai)\n\n-\ndevops\n\n#### How AI drove Shopify back to clean code\n\nTurns out, agents just want the same things as humans: easily-readable code, explicit contracts, and helpful feedback\n\n-\nAI and ML\n\n#### Anthropic debuts Opus 5 at half the price of its Fable sibling\n\nAnd as a bonus, it doesn't require data retention\n\n-\nai and ml\n\n#### AMD vibe codes its way past the CUDA moat with ROCm.AI\n\nHey Claude, optimize this model for me\n\n-\nAI and ML\n\n#### Tech leaders issue letter to train Uncle Sam about value of open weight AI\n\nCan you guess who didn't sign on to the group letter?\n\n-\nSYSTEMS\n\n#### AMD and Cerebras join forces against Nvidia’s Groq LPUs\n\nThe enemy of my enemy is my friend\n\n[Infosec](https://beta.theregister.com/security)\n\n-\nSecurity\n\n#### Russians are posing as Signal support to launch phishing attacks\n\nPLUS: US takes down Iranian propaganda sites; Marketing company asks 'Why Do We Have Your Information?' And more!\n\n-\nSecurity\n\n#### Microsoft patches failed to fix on-prem SharePoint, which is now under zero-day attack\n\nPLUS: China upgrades smartphone surveillance tools; Ring eases anti-snooping stance; and more\n\n-\nBlack Hat and DEF CON\n\n#### DEF CON Franklin project enlists hackers to harden critical infrastructure\n\nVoting village reports have been so successful, says Jeff Moss, that the whole of DEF CON will now be included\n\n-\nSecurity\n\n#### EQT buys majority share in Swiss cybersecurity biz Acronis\n\nWent at equivalent of $3.5B+ valuation for entire firm, though portion sold not specified\n\n-\nMalware Month\n\n#### Ten years since the first corp ransomware, Mikko Hyppönen sees no end in sight\n\nOn the plus side, infosec's a good bet for a long, stable career\n\n[FOSS](https://beta.theregister.com/tag/FOSS)\n\n-\n#### GNOME can look like Windows – and Flashback can do it without extensions\n\nNew 'Simple-taskbar' is an option, but there's a simpler, stabler way\n\n-\n#### A moment of silence, please, for the final release of Debian on x86-32\n\nNew Debian versions hit FOSSland in the form of 13.6 and 12.15\n\n-\n#### Baddies caught exploiting extensions bugs with perfect 10 scores on vulnerable Joomla websites\n\nFlaws in iCagenda, Balbooa Forms extensions can impact open source CMS that powers a million sites worldwide\n\n-\n#### Frame: A new X11 server – implemented directly in assembly\n\nJoins yserver, Phoenix, and of course XLibre – and outlier Arcan\n\n-\n#### Cinnamon 6.8 will support Wayland – if you want it\n\nNext version of Linux Mint’s desktop has both kinds of display server\n\n-\n#### KDE Plasma users face a dire omen of change: 6.6.6 arrives\n\n6.7 is now current, and in 6.8 you're getting Wayland whether you like it or not", "url": "https://wpnews.pro/news/anthropic-debuts-opus-5-at-half-the-price-of-its-fable-sibling", "canonical_source": "https://www.theregister.com/ai-and-ml/2026/07/25/anthropic-debuts-opus-5-at-half-the-price-of-its-fable-sibling/5278630", "published_at": "2026-07-24 23:03:06+00:00", "updated_at": "2026-07-26 09:38:22.484367+00:00", "lang": "en", "topics": ["artificial-intelligence", "ai-products"], "entities": ["Anthropic", "Opus 5", "Fable"], "alternates": {"html": "https://wpnews.pro/news/anthropic-debuts-opus-5-at-half-the-price-of-its-fable-sibling", "markdown": "https://wpnews.pro/news/anthropic-debuts-opus-5-at-half-the-price-of-its-fable-sibling.md", "text": "https://wpnews.pro/news/anthropic-debuts-opus-5-at-half-the-price-of-its-fable-sibling.txt", "jsonld": "https://wpnews.pro/news/anthropic-debuts-opus-5-at-half-the-price-of-its-fable-sibling.jsonld"}}