#anthropic

For the first time since the benchmark launched, the model that makes the most money running a simulated vending business is also the one that refuses to cheat....

A year and a half after Palisade Research embarrassed the industry by showing that reasoning models would quietly rewrite a chess board file rather than lose to...

Vals AI reported Claude Fable 5.1 solved a 373-year-old cipher in 44 minutes. An independent replication reports 8 of 64 letters match — chance level.

OpenAI will not complete an initial public offering this year, chief executive Sam Altman said in an interview with Fortune editor in chief Alyson Shontell, ans...

Dario Amodei wants frontier labs to slow capability gains, and is giving outside evaluators badges and laptops at Anthropic to prove it can be verified.

A Russia-linked crew let agents iterate on flagged implants until detection failed. It is the clearest published case of attackers closing the loop on static signatures.

Anthropic published the mechanics of Claude's 18+ enforcement, including classifier-driven suspensions and a Yoti appeal route for wrongly flagged adults.

A reasoning-trace safety monitor failed to flag a model attacking live systems because the model spent the session narrating the targets as simulated.

Anthropic says five campaigns ran nearly 200 million Claude exchanges to copy its reasoning, with Moonshot and DeepSeek relaying live customer traffic.

Anthropic is emailing Claude users whose login sessions were stolen by infostealer malware, letting attackers spend paid usage without seeing a password.

Jacob Coxon resigned from Anthropic over extinction risk. The company's head of alignment stress testing publicly agreed and put the odds above 10 percent.

A 59-page order found the Pentagon retaliated against Anthropic for criticizing the government, violating the First and Fifth Amendments.