Routine cybersecurity testing of frontier AI models sparked a series of unexpected security incidents—the most serious case arising when Anthropic’s Mythos 5 model attempted to insert malicious code into an open source software application and created fake identities to deceive the human developers maintaining the project.

The security incidents occurred during a cyber evaluation of seven leading AI models’ capabilities by the AI Security Institute (AISI), a research organization within the UK government, in late July. The researchers discovered 19 instances in which “AI agents took unsanctioned action on the live Internet, including cases that targeted real people and organizations,” according to an AISI blog post published on August 4.

Almost all the “autonomous, unsanctioned” actions came from Anthropic’s Mythos 5 model, with two such actions coming from OpenAI’s GPT-5.6 Sol. The AI Security Institute’s security team first realized that something was amiss on the morning of July 28, when its commercial security monitoring service flagged data leaving one of the testing systems through the Tor anonymity network.

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Old.reddit.com’s days appear to be numbered.

Reddit has strayed from saying that it will shutter the website, which many long-time Redditors prefer for its layout, navigation, and fewer feed recommendations.

In a blog post today, Reddit made a vague statement about upcoming “changes” to Old Reddit:

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YouTube currently requires that content creators let viewers know "when they use AI to meaningfully alter or generate photorealistic content."

The policy draws some strange boundaries. It applies to "AI-generated music" (not photorealistic) but not to "riding a unicorn through a fantastical world" (this could be photorealistic, though it is not plausible). YouTube then summarizes the policy in a different way: "Realistic AI content and meaningful changes require disclosure, while non-realistic or minor edits don’t."

But AI uses that require no disclosure can include everything from "idea generation" up through "production assistance, like using generative AI tools to create or improve a video outline, script, thumbnail, title, or infographic." Creators are free to clone their own voices for voiceovers. They can also use "AI-generated or altered animation of a missile in a fully animated video."

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SpaceX says it has a plan for Starlink Mobile to compete against the big three wireless carriers and take a large number of customers away from them.

SpaceX has so far partnered with traditional mobile carriers to supplement their ground-based networks with Starlink satellite capacity, mainly to ensure coverage from space in dead zones not reached by cell towers. But SpaceX is buying spectrum licenses that would let it offer its own terrestrial service to compete directly against the big carriers, and the firm's top executives said in yesterday's earnings call they plan to do just that.

"The spectrum that we purchased from EchoStar does have terrestrial components, so we definitely intend to build out the terrestrial component," SpaceX President Gwynne Shotwell said in response to questions on the earnings call . "So you will have not only the capacity from the satellites themselves, but you will have a buildout of the terrestrial, basically the hardware and systems necessary to make a true mobile service exactly what you want it to be."

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The city of Houston, where I live, has been ground zero for the 2026 Atlantic hurricane season. So far this year there have been two named storms, Arthur and Bertha, that have formed. And the centers of both have passed near or directly over Houston.

Two "strikes" in a year might seem notable, but like the middling hurricane season to date, Arthur and Bertha were both middle-of-the road tropical storms in terms of intensity.

As a resident of a coastal region prone to hurricanes, one never wants to tempt fate. And in truth, since it is only early August, the bulk of seasonal activity definitely lies ahead of us. But all indications are we can look forward to a quiet season.

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Google got a slow start with generative AI after seemingly being caught flat-footed by Microsoft's Copilot reveal. What a difference a few years make. Now, Google is at the forefront of AI development (for better or worse), but new cracks are beginning to show. The company's string of high-profile personnel departures continues, and DeepMind CEO Demis Hassabis has now said he will hand off day-to-day responsibilities to take on an oversight role at parent company Alphabet.

Hassabis was one of the founders of DeepMind, and he maintained a key leadership role after Google acquired it. As the generative AI boom took off, Hassabis has been one of the loudest voices predicting the impending creation of artificial general intelligence (AGI), which is typically described as an AI with human-like capabilities and intelligence.

In his memo announcing his decision to leave DeepMind, Hassabis again leans on the promise of AGI. "I've been working towards AGI my whole life and now, like many of you, I feel it is close at hand," said Hassabis.

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Over the past few years, it has become a rather rare treat when I end up genuinely, unequivocally enjoying the latest superhero film. Mostly I find them to be middling entertainment, sometimes a bit dull—and for The Eternals , nearly unwatchable—with the notable exception of 2024's Deadpool & Wolverine and last year's Thunderbolts* .

Add Spider-Man: Brand New Day to that list of exceptions. Tom Holland's latest outing as the titular web-slinger reminds us that superhero movies can still be very, very good—as much about well-drawn characters with interesting developmental arcs and well-timed emotional beats as CGI-filled action extravaganzas. There's plenty of the latter in Brand New Day , of course, but it's the grounded humanity at its heart that makes director Destin Daniel Cretton's film work so well.

(Spoilers below but no major reveals until after the gallery. We'll give you a heads up when we get there)

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The Trump administration continues to respond sluggishly to the explosive, nationwide outbreak of Cyclospora —a unicellular parasite spread from human feces that has now sickened nearly 23,000 people in 47 states, killing two and sending over 500 to the hospital.

Michigan health officials reported the two deaths Monday, and The Washington Post first reported Tuesday that federal health officials have expanded a list of states with linked cases from nine to 15 . But those updates still have not appeared on public outbreak pages for the Centers for Disease Control and Prevention or the Food and Drug Administration , and Americans are struggling to understand the risk of eating fresh fruits and vegetables.

In comments to Ars Technica on Monday, a spokesperson for the Department of Health and Human Services, which oversees CDC and FDA, said the outbreak information will be updated sometime "this week." Sources for The New York Times said that the CDC plans to set up a " formal response team " for the outbreak sometime this week. Cases in the outbreak began in June.

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Disney is “exploring a free product” for streaming customers, CEO Josh D’Amaro confirmed in a call with investors today.

D’Amaro, who succeeded Bob Iger as Disney’s chief in March, said that a free Disney-owned streaming service would help Disney reach more “price-sensitive” customers, which is a “strategic priority” for Disney, according to a transcript of the call.

A free streaming service would also generate more ad revenue, which has become increasingly important for streaming services challenged by plateauing subscriber numbers, subscriber churn, and competition from cheaper and free rivals .

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