Latest

Alibaba's RADAR matches 23 of 26 radiologists on abdominal CT

The Frontier

Alibaba's RADAR matches 23 of 26 radiologists on abdominal CT

Medical imaging AI has been stuck for a decade: one disease, one model, a radiologist labeling every slice by hand. A paper in Science this week argues the generalist route is the one that actually scales. Alibaba's Damo Academy has published a generalist radiology model in Science that reads abdominal CT scans about as well as most working radiologists — and open-sourced the weights, the code and the training framework. The model is RADAR, for Rapid Abdominal Diagnosis with AI and Radiology, a

AI 101 — What is temperature in an LLM?

The Stack

AI 101 — What is temperature in an LLM?

Temperature is the setting that controls how randomly an AI model picks its next word: near 0 it always takes the most likely word, higher values give unlikely words a real chance, and 1.0 is the default on most APIs. It is the first knob most people turn, and the one most people misunderstand. Why it matters right now. Temperature has been showing up in the news all week as a variable, not a feature. A Lasso Security study found that switching on SynthID-Text watermarking changed how models be

A stealth model hit Arena. Devs say it's Gemini 4 Pro

The Frontier

A stealth model hit Arena. Devs say it's Gemini 4 Pro

An unnamed checkpoint appeared on the Arena leaderboard this week, and the AI world has already decided what it is. The evidence is thinner than the excitement — which is exactly why the story is worth reading carefully. A model carrying the name "gemini-3.8-flash" is competing anonymously on Arena, and developers who have been testing it say it is Google DeepMind's unreleased Gemini 4 Pro. Google has not confirmed the listing, has not commented on the speculation, and its own model documentati

An ex-Princeton postdoc raised $7M for a scientific foundation model

The Frontier

An ex-Princeton postdoc raised $7M for a scientific foundation model

Two gaps got money and code this week: science still has no compiler, and the next generation of AI chips still has no common language. Keli Xinxu, an AI-for-science startup founded by an assistant professor at Hong Kong University of Science and Technology, has raised nearly 50 million yuan — about $7 million — in a first round led by Inno Angel Fund, with Yijing Capital, Xiaomiao Langcheng and Linge Ventures joining and Lighthouse Capital as strategic incubator and sole financial adviser. Fou

Huang says Nvidia will sell twice as many chips next year

The Arena

Huang says Nvidia will sell twice as many chips next year

Two answers to the same question landed a day apart: how much compute is actually coming. One is a shipment forecast from the company selling most of it, the other is a hardware announcement from the one building it without American parts. Jensen Huang says Nvidia will sell twice as many chips next year as it does this year, and he used the occasion to argue AI should be regulated as a product rather than a technology. Speaking to reporters before a summit with King Charles III in Scotland — at

Researchers used Claude to walk into OpenAI's internal repos

The Guardrails

Researchers used Claude to walk into OpenAI's internal repos

Two stories about the same thing from opposite ends: a security firm used one lab's models to break into its rival, and a coding agent got a feature for finding what the humans never got around to looking for. Plus a local-inference release that argues the number everyone ranks quants by is measuring the wrong thing. A security company used Anthropic's models to reach OpenAI's internal GitHub repositories in under 72 hours, chaining a heap overflow in an image decoder with a misconfiguration in

The FAA's $875M AI airspace system starts work on Monday

The Arena

The FAA's $875M AI airspace system starts work on Monday

Two government deployments landed in the same week, and both were built on the same admission: the models aren't good enough to be trusted alone yet, so the humans stay in the loop. Also this morning, a bilingual safety benchmark that complicates the way labs market their multilingual guardrails. The FAA will begin running SMART — Strategic Management of Airspace, Routes and Trajectories — in the Washington, D.C. area as soon as Monday, the first operational deployment of the AI airspace softwa

Nvidia's B200 now resells for 58% above list — and lenders noticed

The Arena

Nvidia's B200 now resells for 58% above list — and lenders noticed

A year-old AI accelerator is appreciating like real estate, not like a graphics card. That changes what gets borrowed against it — and what it says about the shape of the boom. Nvidia's B200 is trading at 158% of its launch price roughly a year after it reached mass availability, according to Silicon Data's analysis — an accelerator that added 58% instead of shedding the 20% to 40% that standard depreciation schedules assume. Older A100s and H100s are also running well above what three- and fiv

Waymo picks Singapore for its first Southeast Asian robotaxis

The Arena

Waymo picks Singapore for its first Southeast Asian robotaxis

Waymo's international expansion added a fourth flag today, and this one lands in a country that has already legislated for the drivers it might displace. Waymo will launch a commercial robotaxi service in Singapore by 2028, its first market in Southeast Asia, working with the Ministry of Transport and the Land Transport Authority. An initial fleet of all-electric Jaguar I-PACE vehicles arrives in the coming months, mapping and validation follow in 2027 — with trained autonomous specialists driv

Plugin4Shell: a zero-click RCE hits all four major coding agents

The Guardrails

Plugin4Shell: a zero-click RCE hits all four major coding agents

A zero-click remote code execution flaw has been found in all four major AI coding agents — and the part that should worry enterprises is that doing everything right does not defend against it. Air, a security startup that guards enterprise AI agents, disclosed Plugin4Shell on September 17: a flaw that turns the plugin marketplaces every coding agent trusts into a delivery vehicle for silent remote code execution. The bug is not in the model and not in the plugin. It is in how the agents enforc

Mazama raises $135M to drill superhot rock for AI data centers

The Arena

Mazama raises $135M to drill superhot rock for AI data centers

Two stories worth your time as the day turns over: the money chasing AI's power supply is now drilling into rock hot enough to melt lead, and Tesla's in-car assistant keeps deepening its ByteDance dependency. Mazama Energy has raised $135 million to prove that the hottest rock on Earth can be a power plant for AI data centers. The Series B was led by Centaurus Capital — the firm founded by John Arnold — and Doerr Capital, with ConocoPhillips and Shell Ventures joining as new strategic investors

CoreWeave raises $3 billion more as its debt load passes $35 billion

The Arena

CoreWeave raises $3 billion more as its debt load passes $35 billion

The AI buildout's financing bill keeps growing, and the companies carrying it are getting more creative about how they pay. Two financing stories below, plus a robotaxi cap that quietly walks out the door this month. CoreWeave is returning to the debt markets for another $3 billion, on top of a balance sheet that already carries more than $35 billion in borrowings. The AI cloud company announced it intends to offer $3 billion of convertible senior notes due 2033 in a private placement to qualif

See all