Anthropic

Open-sourcing circuit tracing tools

Our open-source tools generate attribution graphs showing how language models reach decisions.

Claude for Creative Work

New connectors let Claude work inside Adobe Creative Cloud, Blender, Autodesk Fusion, SketchUp, and music production tools to support creative workflows.

Reflections on our Responsible Scaling Policy

Lessons from implementing our first Responsible Scaling Policy, which focuses on catastrophic safety failures and misuse of frontier models.

Effective context engineering for AI agents

In this post, we explore strategies for effectively curating and managing their context.

Claude is now available in Europe

Claude, Anthropic's trusted AI assistant, is now available for people and businesses across Europe.

Detecting and countering misuse of AI

Anthropic's August 2025 threat intelligence report on AI cybercrime and other abuses.

Making frontier cybersecurity capabilities available to defenders

Claude Code Security is one step towards our goal of more secure codebases and a higher security baseline across the industry.

Anthropic Economic Index report: economic primitives

New metrics of AI usage provide a rich portrait of interactions with Claude in November 2025, just prior to the release of Opus 4.5.

Using Claude to reduce the attack surface of code

Automated attack surface analysis and reduction can meaningfully improve the security of deployed software in the near term. In this post, we preview data we’ve collected from applying attack surface reduction techniques to large open-source codebases using Claude.

Previewing the Model Hardware Standard

Anthropic is opening a research preview of the Model Hardware Standard (MHS), a shared specification for AI agents to safely operate physical devices, to a first group of scientific research labs and advanced manufacturers.

Clio: A system for privacy-preserving insights into real-world AI use

Anthropic's new system, Clio, analyzes how people use AI while maintaining their privacy.

Claude's Max Plan

Covering electricity price increases from our data centers

Anthropic commits to covering consumer electricity price increases caused by its data centers, including grid upgrades and new power generation.

The assistant axis: situating and stabilizing the character of LLMs

Who is the Assistant? We investigate the character that most modern language models inhabit when interacting with users.

Effective harnesses for long-running agents

How an initializer agent and an incremental coding agent help the Claude Agent SDK make steady progress across many context windows.

How scientists are using Claude to accelerate research and discovery

Labs at Stanford and MIT built Claude-powered systems that run genome-wide studies in minutes and automate gene cluster interpretation.

Anthropic forms $200M partnership with the Gates Foundation

We're committing $200 million in grants, Claude credits, and technical support for global health, life sciences, education, and economic mobility programs.

Measuring political bias in Claude

We introduce and open-source an automated evaluation for political even-handedness, testing six models across 1,350 prompt pairs.

Measuring AI agent autonomy in practice

Analysis of millions of human-agent interactions shows agent turns getting longer, with software engineering making up nearly half of tool calls.

AI models may be capable of self-replicating without access to a datacenter

Small AI models may be only months away from being able to self-replicate across cheap IoT devices like Android TV boxes, with no datacenter needed.

Anthropic invests $50B in US AI infrastructure

Anthropic is partnering with Fluidstack to build data centers in Texas and New York, creating roughly 800 permanent and 2,400 construction jobs.

Claude designed protein binders against scorpion neurotoxins

We asked an internal research Claude model to design minibinders (small proteins that attach tightly to a target) against scorpion neurotoxins.

Anthropic: Expanding Access to Claude for Government

Claude 3 Haiku and Sonnet are now available in the AWS Marketplace for the US Intelligence Community and in AWS GovCloud.

Yes, Claude can do nine loops

Claude computes a nine-loop amplitude in N=4 super-Yang-Mills

AI for scientific discovery: How researchers use Claude

We analyzed 207,000 research sessions to learn how Claude is used in science, why some tasks get more use than others, and how AI could speed up discovery.

Agentic Misalignment: How LLMs could be insider threats

New research on simulated blackmail, industrial espionage, and other misaligned behaviors in LLMs.

Detecting and Preventing Distillation Attacks

We identified coordinated distillation attacks using ~24,000 fraudulent accounts to extract Claude's capabilities.

How Claude's text watermarking works

Future Claude models will generate text that contains a watermark to comply with the EU AI Act. We answer questions about how it works and whether it affects outputs.

Code execution with MCP for efficient agents

Learn how code execution with the Model Context Protocol enables agents to handle more tools while using fewer tokens, reducing context overhead by up to 98.7%.