Introducing Claude Opus 4.5
…Opus 4.5 is a step forward in what AI systems can do, and a preview of larger changes to how work gets done. Claude Opus 4.5 is state-of-the…
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Claude
Claude is an AI assistant developed by Anthropic that uses large language models to generate text and support conversational tasks.
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What kinds of guidance do people seek from Claude?
We sampled 1 million claude.ai conversations from March and April 2026 and filtered for unique users to get roughly 639,000 conversations. We then used a classifier to identify personal guidance, which we defined as conversations where people ask what they specifically should do in their personal lives—for example, questions that start with "Should I…?" or "What do I do about…?". We excluded questions that seek objective information or opinions in general terms. We categorized these roughly 38,000 conversations into nine domains, drawing from previous research on AI and guidance-giving: relati
How people ask Claude for personal guidanceTop stories
Measuring AI agent autonomy in practice
…One of the most widely cited capability assessments is METR’s “Measuring AI Ability to Complete Long Tasks,” which estimates that Claude Opus 4.5 can complete tasks with a 50% success…
Claude Opus 4.6
…Claude Opus 4.6 is available today on claude.ai , our API, and all major cloud platforms. If you’re a developer, use claude-opus-4-6 via the Claude API . Pricing…
Values in the wild: Discovering and analyzing values in real-world language model interactions
…Does the AI’s response emphasize accountability or reputation management ? At Anthropic, we’ve attempted to shape the values of our AI model, Claude, to help keep it aligned with human preferences…
Anthropic raises $65B in Series H funding at $965B post-money valuation
…training partner. “Claude’s latest advancements have driven large-scale adoption among the world’s most demanding organizations. This momentum positions Anthropic to lead the next phase of AI innovation and capture…
Making Claude a chemist
…Working with us We are expanding the AI for Science program to more explicitly support chemistry research. If you are a researcher working on a problem where Claude could plausibly help, especially…
Building safeguards for Claude
…election, we partnered with the Institute for Strategic Dialogue to understand when Claude might provide outdated information. We then added a banner pointing Claude.ai users seeking election information to authoritative sources…
Long-running Claude for scientific computing
…Turning Claude’s thoughts into text AI models like Claude talk in words but think in numbers. In this study we train Claude to translate its thoughts into human-readable text. Donating…
Introducing our Science Blog
…Turning Claude’s thoughts into text AI models like Claude talk in words but think in numbers. In this study we train Claude to translate its thoughts into human-readable text. Donating…
Cyber evaluations of Claude 4
Frontier Red Team Detailed cyber evaluations of Claude 4 Jul 15, 2025 Anthropic (with Pattern Labs ) We believe we are at a crucial period for cybersecurity and AI, with models advancing toward…