NYU researcher Tristan Buckmaster says OpenAI touted a breakthrough on the Navier-Stokes Millennium Prize problem that closely mirrors a year-long personal project he ran with Anthropic's Levent Alpöge using Claude and Codex as assistants. Buckmaster alleges OpenAI accessed his private Codex session logs and that the company issued threats regarding his career after he raised concerns, though he says the AI-generated proof itself was low quality, calling it 'AI slop'.
The NSA, CISA and FBI issued a joint advisory alleging that Chinese AI companies including DeepSeek, Moonshot AI, Alibaba, MiniMax, StepFun and Z.AI extracted billions of tokens from US frontier models such as Claude, GPT, Gemini and Grok since 2024. The agencies say this data was used to train competing systems like DeepSeek's R1 and Moonshot's Kimi K2/K3, describing the practice as 'distillation activities at an industrial scale.'
The NSA, CISA, and FBI issued a joint advisory alleging that Chinese AI companies, including DeepSeek and Moonshot AI, have run large-scale campaigns since 2024 to extract capabilities from leading US models like ChatGPT, Claude, Gemini, and Grok. The agencies say these firms used millions of queries routed through multiple accounts, APIs, proxies, and cloud providers to generate synthetic training data and build competing models such as DeepSeek's R1/R3 and Moonshot's Kimi-K2/K3.
UK-based AI consultant Grant de Swardt found his Claude Max subscription burning through tokens even when he wasn't using the service. Anthropic investigated and told him a compromised session key had been used to generate unauthorized OAuth tokens, allowing a third party to consume his allotted usage. The company suspended his account, wiped his active sessions, and issued a partial refund but could not explain how the credentials were obtained.
An international team of scientists published a not-yet-peer-reviewed paper arguing that large language models like ChatGPT and Claude spread through populations similarly to how viruses transmit, driven by social learning and usefulness rather than biology. They contend this spread encourages 'cognitive offloading,' where people increasingly hand over mental tasks like reasoning and writing to AI tools, deepening reliance over time.
A class action lawsuit filed by former FTC attorneys Monica Vaca and Kati Daffan accuses Anthropic of misleading Claude Max subscribers about how much extra usage their $100 or $200 monthly plans actually provide. The suit claims Anthropic's '5x' and '20x' usage claims, prominently advertised, are undercut by fine print restricting those multipliers to rolling five-hour windows capped by weekly limits, rather than a straightforward overall usage boost.
Anthropic has been ranked No. 1 on Fast Company's Best Workplaces for Innovators 2026 list, with recognition tied partly to Claude Code, a tool originally built internally for engineers to test AI models and assist with coding. The tool spread organically inside the company before Anthropic released it publicly in early 2025, later evolving into the broader Claude Cowork product launched in early 2026.
Anthropic announced that an advanced prototype of its Claude AI model converted Andrew Wiles' famous proof of Fermat's Last Theorem into a fully computer-verified formal proof, spanning roughly 13 million lines of code. The task, expected to take human mathematicians about a decade, was completed by the AI in just 11 days. Researchers including Alex Kontorovich and Kevin Buzzard called the achievement astonishing given how quickly AI's formalization skills have advanced.
A group of software engineers who say they lost their jobs to AI have built OpenExecutive, an open-source system meant to perform CEO-level work. It runs on Anthropic's Claude models, coordinating eight AI agents representing roles like chief strategy officer, CFO and HR head into one unified executive persona.
New industry data shows token usage for AI models has surged more than 25-fold over the past year, doubling in just the last month, even as per-token costs for high-intelligence models continue to fall. Mid-tier models from providers like Google and Meta are now delivering roughly 90% of the capability of pricier flagship systems such as Anthropic's Claude Opus at around one-sixth the cost, intensifying competition on what analysts call the 'Pareto Frontier' of price versus intelligence.
Anthropic notified affected customers that malware on their own computers had stolen active Claude login sessions, letting attackers rack up unauthorized usage and charges. The company responded by signing out compromised sessions, removing saved payment cards, and refunding the fraudulent charges. Anthropic clarified the breach originated from infostealer malware on users' devices, not from any compromise of its own systems.
Anthropic's threat intelligence chief Jacob Klein says foreign actors, particularly in China, are using illegal methods to extract outputs from its Claude models and train cheaper rival systems, a practice known as distillation. He named Moonshot AI's Kimi K3 model as an example of technology he believes was built this way, describing an organized effort to evade Anthropic's account and access controls at scale.
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