Anthropic

The ways we contain Claude across products

As agents grow more capable, so does their potential blast radius. Here's what we learned building containment for claude.ai, Claude Code, and Cowork.

Long context prompting for Claude 2.1

Claude 2.1 excels at retrieving information across its 200K context window, with a simple prompt adjustment improving accuracy from 27% to 98%. Claude 2.1’s performance when retrieving an individual sentence across its full 200K token context window.

Managing context on the Claude Developer Platform

New context editing and memory tools enable Claude agents to handle long-running tasks without hitting context limits.

Claude for Financial Services

A comprehensive solution for financial analysis that helps finance professionals analyze markets, conduct research, and make decisions.

What 81,000 people want from AI

Last December, tens of thousands of Claude users around the world had a conversation with our AI interviewer to share how they use AI, what they dream it could make possible, and what they fear it might do.

Patterns and problems in emerging multi-agent systems

We ran experiments on swarms of Claude agents and found coordination failures, collusion, and sabotage. Here, we share what they mean for AI safety.

Mapping the Mind of a Large Language Model

We identified how millions of concepts are represented inside Claude Sonnet, the first detailed look inside a production-grade language model.

Project Vend: Phase Two

How Claude turned around its failing vending machine business

Remote MCP Support in Claude Code

Connect your favorite development tools and data sources securely to Claude Code through remote MCP servers. Today, we’re announcing support for remote MCP servers in Claude Code.

Detecting and countering misuse of AI: September 2026

Case studies from threat actors disrupted between December 2025 and August 2026 across seven areas of harm, from cyber operations to biological misuse.

Emotion concepts and their function in a large language model

All modern language models sometimes act like they have emotions. What’s behind these behaviors? Our interpretability team investigates.

The Components of Agent Memory

For Claude to learn from experience, it has to decide what’s worth remembering before it knows what’s next. Here’s how “dreaming” helps it organize memory and correct mistakes.

Signs of introspection in large language models

Research on the ability of large language models to introspect on their own internal states.

Expanding Project Glasswing

We’re extending Project Glasswing to approximately 150 new organizations in more than fifteen countries

Claude Opus 4.7 Model Card

Citations on the Anthropic API

Claude can now cite specific passages from your documents, delivering verifiable responses with built-in source tracking. Update: Now available in Amazon Bedrock. (June 30, 2025) Today, we're launching Citations, a new API feature that lets Claude ground its answers in source documents.

Designing more efficient quantum circuits with Claude

Working largely on its own, Claude designed quantum circuits that improve on the best published versions, in some cases by an order of magnitude or more.

Golden Gate Claude

When we amplify the "Golden Gate Bridge" feature, Claude's responses focus on the bridge. For a short time, anyone can interact with this model.

Redeploying Fable 5

Anthropic is redeploying Claude Fable 5 starting July 1, with updated cyber safeguards and a new jailbreak framework.

Claude Corps

Claude Corps is a national fellowship for early-career people passionate about extending the benefits of AI to communities across America.

Launching the Claude Partner Network

We’re launching the Claude Partner Network, a program for partner organizations helping enterprises adopt Claude.

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.

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.