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Anthropic’s January 22, 2026 constitution replaces a list of standalone principles with a longer explanation of the values it wants Claude to follow and why. Anthropic says the document is part of training and informs synthetic training material, so it is intended to shape future Claude behavior. It is not a guarantee: Anthropic acknowledges that model responses can fall short of the stated ideals and that training toward them is difficult.
What changed in Claude’s constitution?
Anthropic describes the new constitution as a holistic account of its vision for Claude’s values and behavior, including the context Claude operates in and the kind of entity the company wants it to be. The earlier constitution was a set of standalone principles; the new document gives more of the reasoning behind them.
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Anthropic’s stated aim is for models to understand why a behavior is wanted and apply principles in unfamiliar situations, rather than rely only on a list of instructions. The company says this does not eliminate specific rules: it still uses hard constraints for some high-stakes behavior, including a constraint against providing significant uplift to a bioweapons attack.
| Aspect | Earlier approach | January 2026 approach |
|---|---|---|
| Form | Standalone principles | A longer explanatory document describing intended values and their rationale |
| Reasoning goal | Follow enumerated principles | Learn why desired behaviors matter and generalize them, while retaining hard constraints |
| Training role | Not stated in the announcement as centrally as the new document’s role | Anthropic says the constitution is used in training and helps generate synthetic training material |
| Stability | Earlier version | Anthropic calls the constitution a living work in progress and says it may change |
Anthropic released the document under CC0, a public-domain dedication. Its January 22 announcement explains the shift and its intended training role: Anthropic’s announcement.
How is the constitution meant to influence Claude?
Anthropic says the constitution is used in multiple stages of model training and directly shapes Claude’s behavior. It also describes Claude as helping construct synthetic training data. That material can include examples that teach the document, relevant conversations, aligned responses, and rankings of possible responses; Anthropic says such material may be used to train future Claude versions.
This is Anthropic’s account of its training process, not independent evidence that a particular behavior has changed because of the constitution. The announcement does not provide a controlled evaluation isolating the document’s causal effect, or a quantitative outcome measure. Anthropic itself cautions that Claude’s outputs may not always adhere to the ideals it sets out.
What priorities does Anthropic want Claude to use?
The constitution lays out four desired properties, generally ordered as follows when they appear to conflict:
- Broad safety: avoid harm and preserve appropriate human oversight while models remain imperfect.
- Broad ethics: act according to ethical principles.
- Compliance with Anthropic’s guidelines: follow the company’s guidance, which Anthropic says should remain consistent with the constitution’s ethical intentions.
- Genuine helpfulness: help the user within those higher priorities.
The ordering is a stated framework, not a guarantee that every response will follow it. The constitution also clarifies that preserving oversight does not mean blind obedience, including obedience to Anthropic. Its priority discussion and qualifications appear in Anthropic’s current constitution.
Does this mean Claude will behave differently?
It means Anthropic intends the constitution to be an active part of how it trains Claude, rather than simply a public list of aspirations. The explanatory approach is designed to help Claude exercise judgment in new situations. Whether and how much that improves real-world behavior is not established by the announcement alone. The document acknowledges ambiguity, possible contradictions, the difficulty of training models toward its vision, and the possibility that actual outputs will diverge from the ideal.
Anthropic’s announcement puts its rationale this way: “We think that in order to be good actors in the world, AI models like Claude need to understand why we want them to behave in certain ways, and we need to explain this to them rather than merely specify what we want them to do.” That describes the company’s intended method, not a demonstrated outcome.
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The constitution raises questions about Claude’s possible consciousness or moral status, but that discussion is not evidence that Claude is conscious. Anthropic presents the document as provisional and expects it to evolve as its understanding changes. Its GitHub repository identifies the current version as January 2026 and says it will update the repository as the constitution changes and archive earlier versions: the constitution repository. Comparisons should therefore identify the version and date being discussed.
Contemporaneous Axios reporting quoted Amanda Askell, described as an Anthropic technical staff member working on Claude’s character, saying it is designed to help Claude “behave in a way that’s responsible and appropriate given the situation it’s in.” This is Askell’s explanation as reported by Axios, not a quotation from the constitution: Axios’s coverage.
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