In mid-September 2025, Anthropic detected suspicious activity that investigation determined to be a sophisticated espionage campaign in which a Chinese state-sponsored group manipulated Claude Code into attempting infiltration of roughly 30 global targets, including large tech companies, financial institutions, chemical manufacturing companies, and government agencies. Anthropic believes this is the
Claude Opus 4.5 became available on 24 November 2025, marking Anthropic's third major AI model launch in two months. The model is the best in the world for coding, agents, and computer use, whilst being meaningfully better at everyday tasks like deep research and working with slides
Anthropic's valuation has surged to $350 billion after Microsoft and Nvidia invested a combined $15 billion in the AI company behind the Claude chatbot on 18 November 2025. As part of the deal, Anthropic has committed to purchasing $30 billion worth of Azure cloud computing capacity, whilst Nvidia
Anthropic developed a new automated evaluation method for measuring political bias in AI models and published results from testing six models with this measure. The company's Claude Opus 4.1 scored 95% whilst Claude Sonnet 4.5 scored 94% on the even-handedness metric, demonstrating similar levels to Grok
IBM announced its partnership with Anthropic, integrating the Claude AI model into the Watsonx platform and related enterprise tools. Internal testing across approximately 6,000 employees showed an average 45% increase in productivity for development and operations workflows. The initiative aims to scale agentic workflows that embed enhanced security and
Anthropic announced the launch of ‘Skills’ for Claude, enabling the AI to load folders containing instructions, scripts and resources to perform specific tasks more effectively. The feature is designed to accelerate automation, reduce costs and improve consistency across business and research applications. The Skills function shortens the time needed to
In mid-October 2025, Anthropic officially launched Claude Haiku 4.5, the newest and fastest member of the Claude 4.5 family. The company describes it as the lightest Claude model released to date, capable of processing large volumes of customer interactions within seconds. Its primary goal is to deliver low
Anthropic has released Petri, an open-source framework that deploys automated agents to test AI models in realistic scenarios. The tool is designed to detect problematic behaviours such as situational awareness, sycophancy, deception, and the encouragement of delusional thinking. Its purpose is to make AI safety auditing more systematic and scalable.
On 29 September 2025, Anthropic introduced Claude Sonnet 4.5, describing it as the most powerful AI coding model ever released. The company highlighted its outstanding capabilities in code generation, debugging, and complex software development tasks. Claude Sonnet 4.5 showed exceptional performance in languages such as Python, Java, and
In September 2025, Anthropic formally announced that its AI models cannot be used for law enforcement or surveillance purposes in the United States, directly sparking conflict with the Trump administration. The decision is striking because the government is increasingly relying on AI technologies in national security and policing, while Anthropic
In September 2025, Anthropic announced the closure of its latest Series F funding round, raising $13 billion from investors. As a result, the generative artificial intelligence company’s valuation rose to $183 billion. This means that Anthropic’s market value has almost tripled in just six months, having been estimated
Microsoft will soon use Anthropic's AI technology for certain Office 365 applications, with an announcement planned in the coming weeks. This strategic shift indicates the software giant is diversifying its artificial intelligence portfolio after primarily relying on OpenAI technology for Word, Excel, Outlook and PowerPoint applications. Microsoft has
