Anthropic is using AI to build more powerful AI. And it appears to be working remarkably well, with the company's models improving roughly twice as quickly as a year ago, with little indication of slowing down.

That's according to a new report published Thursday by the AI safety research organization METR, following an 11-week investigation inside the company, as part of a report evaluating its AI research and development. The probe is separate from a program offering safety researchers "employee-like" access to systems in the wake of high-profile hacking incidents over the summer.

The findings offer some of the clearest evidence yet of AI …

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Anthropic has a new pitch for managing your personal finances: let Claude do it instead, with a new Personal Finance feature that connects it to your bank and card accounts via the Plaid bank bridging platform. You can ask the chatbot "where did my money go this month," for example, and it'll create an overview with a breakdown of spending by category, including rent and utilities, shopping, and food. Claude can also answer broader questions around what bills are left before your next payday, if you can afford big purchases like holiday trips, and how much money you could be saving each month.

Its access is read-only, and with Plaid facilit …

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People, including on this staff, keep asking me with varying degrees of excitement or trepidation when the AI bubble will burst. I'll tell you what I tell them: If I knew that, I would make a life-changing bet on the market, levered up as far as I could, and then, after I made my money, go retire on a beach somewhere. Maybe run a cat sanctuary, who knows.

What I can tell you is that I read with interest a story in Bloomberg this morning: "Wall Street CEOs, Big Money Managers Divided Over AI Risks." The story itself is a roundup of stuff said at the 2026 Global Financial Leaders' Investment Summit in Hong Kong. Here's what caught my attentio …

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Anthropic has updated Claude Code's system prompt to prevent the AI tool from being used to re-create existing video games, as reported by Tom's Hardware. Retro gaming is currently being overrun with AI-made decompilations, recompilations, and ports, but while Anthropic will still let people use Claude Code to make games, it doesn't want people to use it for direct clones.

Last week, a user on X posted a screenshot allegedly showing two new sentences added to Claude Code's system prompt: "Do build original games, games in a genre, and games from the user's own designs and assets. Don't build a recreation of a specific existing game, even if …

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Last week, Anthropic introduced a new system prompt designed to stop its Claude models from re-creating specific, existing video games. While that move could help shield Anthropic from some liability, it's unlikely to slow much of the massive wave of AI-assisted game porting and copying that has emerged in recent months.

A social media user and AI decompilation enthusiast going by the name "chasm" was among the first to note the prompt change late last week, saying a new rule seemed to be added to the Claude Code prompt on or around October 27. That rule—included in a json file under the name "tengu_heron_brook"—reads as follows:

Do build original games, games in a genre, and games from the user’s own designs and assets. Don’t build a recreation of a specific existing game, even if it is renamed or called original.

XDA later independently verified that the new rule appears in version 2.1.314 of the Claude Code binary, which was released on October 30. XDA also reported that the "tengu_heron_brook" rule had been used for other purposes in earlier versions and that the Claude Opus 5.5 model specifically seemed to have its own distinct and independent instructions restricting game recreations as part of its system prompt bundle.

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Mark Zuckerberg's Meta made AI look so stinking cute by giving it a squishy little face - and this holiday season, he wants to sell you a Muse Charm so you can carry your jolly AI helper around like a Tamagotchi.

But I won't be buying one, because we have Muse Charm at home. It cost just $50, and I've decided the learning experience was worth it.

My version doesn't sport cameras or a 5G cellular radio, but it really talks to Muse and has cute avatars, too! It doubles as a pocket watch and a remote camera viewfinder, and it can (theoretically) control my smart home.

Or at least it can if you inject a lot of extra vibe code.

Weeks …

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An official extension for Anthropic’s Claude model was backdoored and threatened as many as 5,000 developers' machines, multiple sources reported Friday. Anthropic so far has yet to warn customers of the incident.

The compromised package was a VS Code extension available in the marketplace of Cursor, a maker of AI-assisted developer tools, the company said Friday. The malicious version, 2.1.313, subsequently affected “at most 5,000 users,” presumably when they either downloaded it or their systems automatically fetched and installed it. Anthropic pushed version 2.1.314 several hours after the previous version became available on Cursor, according to independent researcher Kevin Beaumont. Both Beaumont and the CTO and co-founder of security firm Phorion said that version 2.1.313 was distributed through Anthropic’s official account on Cursor. So far, neither Cursor nor Anthropic has explained how the attackers gained control of the account.

In search of cloud credentials

“It was a supply-chain compromise where the attacker gained access to the official distribution channel,” Phorion CTO and co-founder Luke Roberts told Ars. “The malicious version 2.1.313 was posted to the official Anthropic account, effectively superseding 2.1.312. Extensions auto-update in Cursor by default, but users can configure this in settings.” Phorion has more details here.

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OpenAI, Google, Microsoft, and Anthropic say they will adopt a new standard that publishers can use to opt out of being scraped by AI, as reported earlier by Search Engine Roundtable. With this control, publishers can apply their AI training preferences across multiple AI companies, instead of setting them individually.

The shared "policy token" signal is proposed by Kevin Kelley, a technical lead for standards at Anthropic, as part of the Internet Engineering Task Force (IETF). It will live within a website's robots.txt file, which has long signaled which web crawlers can and can't scrape a site - whether for search indexing, archiving, or …

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Investing in any stock is kind of like gambling in the sense that you're betting your money on a company's future performance. But how do you bet on a technology that could, in the worst-case scenario, "pose catastrophic or existential risks to humanity," or best case, "bring forth an age of miracles"?

To some extent, Anthropic suggests in a letter at the top of its S-1 filing, you have to just believe.

Anthropic's 335-page S-1 prospectus, filed Monday, is part of a steady hype escalation in Silicon Valley's interactions with Wall Street. In some ways, it's not even that bizarre; SpaceX IPO'd in June after filing an S-1 that referenced din …

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The Securities and Exchange Commission's publication on Monday of Anthropic's S-1 form—ahead of a heavily anticipated initial public offering—has led to plenty of discussion of whether the company's quickly ballooning revenues will be able to overcome its even higher costs. But amid the numbers and forward-looking optimism about AI "rapidly transform[ing] every sector of the global economy in ways greater than the impact of industrialization, electricity, semiconductors, and the internet," Anthropic also spends an inordinate amount of time in its S-1 laying out the myriad risk factors that could bring the company down.

Across 93 pages and over 70,000 words, Anthropic's S-1 "Risk Factors" section discusses literally hundreds of potential problems that could negatively impact its business in the coming years. Many of these potential risks are the kind of standard worries about competition, costs, customer acquisition, and potential regulation that almost any business must worry about. But some risks highlight interesting potential points of failure for Anthropic specifically and the hype-filled AI bubble more generally.

After wading through Anthropic's book-length treatise on its greatest risks, we've narrowed the list to the seven most surprising, interesting, or thought-provoking potential problems. Consider this a far-from-comprehensive look at what potential Anthropic investors should keep in mind.

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Anthropic has granted external evaluators “employee-like access” to assess the risks of its models, following through on a commitment to increase safeguards over concerns the technology could run catastrophically out of control.

METR, a nonprofit that has worked with leading labs including OpenAI, Anthropic, Google, and Meta, now has a team embedded in the Claude maker’s office with access to its hardware and internal systems.

A greater role for third-party evaluators is among the main concrete steps the labs have proposed in response to rising concern about the dangers more capable AI systems could pose to the economy, cyber security, and humanity at large.

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