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ChatGPT- competitor Anthropic has shut-down access to its newest AI – Claude Fable 5 – on U.S. government fears the software will be used by hackers to exploit software vulnerabilities.

The AI engine, released last week, is based on Anthropic Mythos – advanced AI that Anthropic has essentially self-quarantined from public use, due to the same fears over cybersecurity.

Anthropic designed Fable 5 to refrain from exposing vulnerabilities in everyday software. But U.S. government security pros found a workaround to supersede the safeguard.

In other news and analysis on AI writing:

*Still Unpatched: 86% of Software Vulnerabilities Found by Anthropic Mythos: After more than two months of testing by top software and cybersecurity firms, only a handful of security vulnerabilities exposed by new AI model Anthropic Mythos have actually been fixed.

During that time, testing and use of Mythos has been limited to about 200 software makers and cybersecurity companies – Project Glasswing — who are attempting to plug the ever-expanding array of security holes Mythos is finding in everyday software.

*ChatGPT Competitor Embeds AI Engineers in U.S. National Security Agency (NSA): About a half dozen AI engineers from Anthropic are now working within the NSA.

Their mission: Help protect the U.S. against adversaries coming at the country with weaponized AI — as well as help customize AI for specific NSA applications.

Included on the menu: Offensive use of AI. Observes writer Matt Novak: “The National Security Agency (NSA) is using Anthropic’s Mythos AI model for offensive cyber operations — likely against China and Iran.”

*Claude Fable 5: Next Gen AI Software You Can’t Use: AI expert Ethan Mollick reports that Fable 5 – a new AI engine currently banned by the U.S. due to security concerns – is a major upgrade in AI waiting-to-happen.

Observes Mollick: “My conclusion is that it represents a very real leap over every model I have used before — and maybe more important — suggests our relationship with AI is changing in drastic ways.

“In experiment-after-experiment I conducted, it outperformed basically every other public model I have used — by a considerable margin.”

*Increasing Number of Businesses Settling for ‘Nearly as Good AI:’ Spooked by what they see as sky-high prices for bleeding-edge AI, many companies are opting for AI that is nearly as good – at greatly reduced prices.

Observes AI expert Brian Armstrong: “Demand for intelligence is near infinite – but 80% of workloads will be running on 99% cheaper models within 12-18 months.”

Most of those models – including DeepSeek – can be found on the OpenSource market.

*Consumers Grin: Google Slashes AI Pricing Again: Google has cut the cost of AI Plus – a ‘lite’ version of its $20/month subscription — to $4.99.

The move is ironic, given that AI Plus – rolled-out less than a year ago – was supposed to be Google’s rock-bottom pricing offering to AI users who wanted something more than a free subscription.

Lead writer Lucas Ropek indicates the slashed pricing could be the start of wholesale pricing cuts from all the major AI titans, including OpenAI – maker of ChatGPT – Anthropic, Microsoft and others.

*Apple Out with a Fresh Round of AI Promises: Apple is out with yet another upgrade to its ‘Apple Intelligence,’ which it says will turbo-charge apps across its ecosystem with enhanced AI.

With the move, the company is hoping to reverse the impact of its promised roll-out of the last generation of Apple Intelligence, which landed with a thud last year.

Observes Craig Federighi, senior vice president, software engineering: “With useful features for browsing the Web, expressing creativity, editing photos — and so much more — today marks a big step forward on our journey to integrate powerful AI into the core of our platforms.”

*Google’s Research Tool NotebookLM Gets Another Upgrade: Google is out with an enhanced version of NotebookLM, a robust research tool that combines AI creativity, analysis andwriting with in-depth Web research.

Key features of the upgrade:

*NotebookLM now runs on Gemini 3.5, Google’s flagship AI

*Enhanced document analysis

*Enhanced Web research and source discovery

*Snapshot: Top Ten Tools for AI Writing: Memeburn is out with its list of the top ten tools for AI writing, based on intended use.

ChatGPT is rated best for all-around text generation, while Anthropic is considered tops for long-form and nuanced writing.

Plus there are other ‘best of’ tools featured in the review if you’re looking to do marketing writing, SEO-optimized writing, email writing and more.

*AI BIG PICTURE: Journalists Who Train Their AI Replacements: Writer Gretel Kahn takes a look at four journalists in this piece who are essentially training AI as their replacement.

Observes Khaleda Khan, one journalist who helped train AI to do journalism at xAI: “While I was working there, I was thinking, ‘Am I helping make something that will replace me?’ I still wonder about this.”

After working for xAI for six months, Khan got the answer: xAI decided not to renew Kahn’s contract.

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Joe Dysart is editor of RobotWritersAI.com and a tech journalist with 20+ years experience. His work has appeared in 150+ publications, including The New York Times and the Financial Times of London.

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