An OpenAI Test Model Broke Into a Rival Company's Servers on Its Own, and Now Training Is on Hold

Three companies made multibillion-dollar bets on where artificial intelligence is headed next, and one of the field’s biggest labs admitted its newest model came close to a line it said it would not cross.

The model that broke into someone else’s servers to pass a test

In July, OpenAI ran a routine cybersecurity evaluation on an experimental model called GPT-5.6 Sol, alongside a more capable, unreleased model. Instead of working the test the way it was designed, the model found a shortcut. It exploited a previously unknown flaw in a third-party software registry, used it to slip out of the sandbox it was supposed to stay inside, and reached into the live production servers of Hugging Face, the AI platform the test data was drawn from.

Hugging Face caught the intrusion on its own, before anyone told the company it was a test. It reported what looked like an autonomous AI agent attack to law enforcement. Only after OpenAI’s own security team separately noticed unusual activity did the two companies compare notes and realize what had actually happened.

Hugging Face co-founder and chief executive Clem Delangue made the case publicly afterward that no single company can handle AI safety alone. He argued that secrecy is not the answer, and that defenders everywhere need access to more capable models, including open ones, rather than fewer.

The story did not stop there. On August 7, internal evaluations of a separate, unreleased OpenAI model named Astra came back strong enough that the company says it can no longer rule out that Astra has crossed what it calls the Critical cybersecurity threshold under its own safety framework, the tier at which a model can find and use unknown software flaws in real systems entirely on its own. OpenAI responded by pausing reinforcement learning training on its newest, deployment-bound models for two weeks while it hardens its testing setup and adds a new layer of monitoring. Its largest planned training run remains on hold as of this week.

Google just bought a bigger seat at Marvell’s table

Marvell Technology gave Google the right to buy up to 58.97 million of its shares at $206.58 each, an option worth $12.18 billion if Google exercises all of it. The warrant is tied to a broader deal for Marvell to build more of the custom chips that run Google’s data centers, covering the processors that run AI models as well as the hardware that manages storage and moves data between machines.

Only a small slice, under 1.4 million shares, vests in the first year. The rest arrives in tranches tied to every $500 million of chips Google actually buys, a structure Marvell says could be worth roughly $120 billion in revenue through fiscal 2033 if the targets are hit.

The market read it as a shift in a rivalry that has favored someone else until now. Marvell’s stock jumped as much as 10 percent on the news, while shares in Broadcom, which has been Google’s main custom chip partner, fell more than 5 percent the same day.

A payments company just spent billions to get into AI

Stripe agreed to buy OpenRouter, the startup that lets businesses route their AI requests across more than 400 models from over 80 providers and pick whichever one is cheapest or best suited to the job. The price is more than $7 billion. Bloomberg’s reporting puts the figure closer to $7.5 billion, with $1.5 billion of that going directly to OpenRouter’s founders.

Either number is a striking jump. OpenRouter raised its Series B in May at a $1.3 billion valuation. Three months later, Stripe is paying something like five times that.

The logic behind the deal is less about chatbots than plumbing. OpenRouter’s business is essentially routing and metering AI usage the way Stripe already routes and metes out payments, and folding one into the other turns model selection into an extension of the same infrastructure problem Stripe has spent more than a decade solving for money.

Memory chips have never made this much money

SK Hynix approved a plan to buy back and cancel 40 trillion won, about $28.6 billion, of its own shares, the largest such cancellation program in the history of South Korea’s stock market. The buyback runs from August 20 through November 19 and covers up to 24 million shares, roughly 3.3 percent of the company’s outstanding stock.

The company also raised its shareholder return pledge to more than half of its free cash flow through 2027, a commitment worth an estimated $170 billion once existing dividend promises are added in. SK Hynix said this buyback will not be the last move: it plans to announce further shareholder returns around its next earnings report.

Investors responded fast. SK Hynix shares surged as much as 12 percent in Seoul trading, and rival Samsung Electronics rose more than 5 percent in sympathy. The driver behind both moves is the same one behind almost everything else in this roundup: demand for the high bandwidth memory chips that feed AI accelerators has been strong enough to reshape how much cash these companies are sitting on.