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Taking seriously whether AI systems have interests of their own, and improving how humans and AI treat each other as understanding grows.
2026 Usage Policy update
We’re publishing a new version of our Usage Policy. In this post, we summarize the changes we’ve made.
A global workspace in language models
New interpretability research reveals an emergent mental workspace in Claude that holds internal thoughts that don’t appear in the model’s output.
Anthropic co-founder Chris Olah's remarks on Pope Leo XIV's encyclical "Magnifica humanitas"
The full text of Chris Olah's remarks on the Pope's encyclical on AI.
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.
An update on our model deprecation commitments for Claude Opus 3
We are keeping Claude Opus 3 available post-retirement on claude.ai to all paid users, and making it available by request on the API. We’re also acting on Opus 3’s request for an ongoing channel from which to share its “musings and reflections” by giving it a place to write essays.
Commitments on model deprecation and preservation
We are committing to preserving the weights of all publicly released models, and all models that are deployed for significant internal use.
Signs of introspection in large language models
Our new research provides evidence for some degree of introspective awareness in our current Claude models, as well as a degree of control over their own internal states.
Claude Opus 4 and 4.1 can now end a rare subset of conversations
Claude Opus 4 and 4.1 can now end a rare subset of conversations. An update on our exploratory research on model welfare.
Exploring model welfare
Announcing a new research program at Anthropic on model welfare
Anthropic is a Public Benefit Corporation. Our mission is the responsible development and maintenance of advanced AI for the long-term benefit of humanity.