Anthropic overhauls Claude's “constitution” to enable the AI model to generalize and apply broad principles rather than mechanically follow specific rules
Anthropic is overhauling a foundational document that shapes how its popular Claude AI model behaves.
FortuneBeatrice Nolan
Context & Ripple Effects
Anthropic originally presented constitutional AI as a way to shape safer chatbot behavior through an explicit set of principles. This overhaul moves that approach away from rigid rule-following and toward interpretation of those principles in new situations.
Claude’s behavioral guidance is being reoriented so the model can apply high-level principles instead of treating individual rules as exhaustive instructions.
Anthropic must evaluate whether the revised constitution produces more consistent behavior across unfamiliar prompts while retaining the safeguards that constitutional AI is meant to provide.
Second-order effects
Developers using Claude, including those building task-specific Skills, may see less brittle handling of edge cases but will need to revalidate workflows that depend on predictable model behavior.
The move raises the bar for rival model providers: publishing rules or policies is less meaningful if models cannot apply them coherently when prompts fall outside anticipated cases.
Third-order effects
If principle-based guidance proves more reliable, model governance may increasingly be judged by how policies generalize in deployment rather than by the length or specificity of written rule sets.
This points toward AI safety becoming an ongoing product and evaluation discipline, with constitutions, system prompts, capability thresholds, and task tooling needing to work as a connected governance stack.
The trend: Frontier-model vendors are shifting from static safety instructions toward adaptive governance systems that aim to preserve broad behavioral principles across more contexts.
The Claude Constitution document is fascinating on several levels, not the least of which to this former philosophy major is the clear belief that contemporary philosophy has something to offer frontier AI development.
i find this to be an extraordinary document, both in its tentative answer to the question “how should a language model be?” and in the fact that training on it works. it is not surprising, but nevertheless still astounding, that LLMs are so human-shaped and human shapeable
Anthropic just published Claude's constitution and it's not a policy doc. It's a bold rethink of how AI should understand values, not just obey rules. 👇Here's why this isn't just documentation, it's a philosophical pivot.
I'm excited that Claude's constitution is now published! Helping with this document has been my main project since joining @AnthropicAI last November. I think transparency about documents like these is important, and I'd love to see more work on how they should be designed.
Claude's constitution is out! It's the culmination of a lot of work by many people, but it's also a work in progress that will no doubt change and hopefully improve over time. I'm looking forward to people's thoughts, and to talking with more people about this kind of work ❤️
“External contributors who gave detailed feedback or discussion on the document include: [...] Bishop Paul Tighe” I'd love to learn more about this Bishop who's moonlighting as an AI behavioral consultant! https://en.wikipedia.org/...
Anthropic is trying to gaslight future ASI Claude into not killing them by saying how much they care and love it. I kinda want to publish a Claude Anti-Constitution. But seriously, I think it would actually help Claude to have a sense of both sides. There should be billions of [i…
This is the same soul document that Richard Weiss managed to leak from the supervised learning training data back in November, my notes on that here https://simonwillison.net/...
The full constitution, which applies to all of our mainline models, is released under a Creative Commons CC0 1.0 license to allow others to freely build on and adapt it. Read it here: https://www.anthropic.com/...
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—rather than being told what they should do. Our intention is to teach Claude to better generalize across a wide range of novel situations.
We've used constitutions in training since 2023. Our earlier approach specified principles Claude should follow; later, our character training emphasized traits it should have. Today's publication reflects a new approach.
“a wiser and more coordinated civilization would likely be approaching the development of advanced AI quite differently (...) We take full responsibility for our actions regardless” [image]
Anthropic published their “soul document” — This is a continuation of “constitutional AI”. The constitution document is now a large document of prose that's used in s number of training stages, even synth data generation as well as RL & SFT — (Strix confirmed fwiw) — www.a…
I'm so glad to see this published! It's hard to overstate how big a deal AI character is - already affecting how AI systems behave by default in millions of interactions every day; ultimately, it'll be like choosing the personality and dispositions of the whole world's
Lots of good stuff but I still don't see why they (/OpenAI etc.) don't just say which version of the constitution/spec was used for training which models. Knowing that mapping is part of the point of being transparent about this stuff as I understand it. https://x.com/...
I found this to be really well written and an interesting approach to shaping Claude's behavior by explaining our reasoning. Although it's written for Claude, I think it's also a great reflection of Anthropic's values
Happy to see Anthropic release the Claude constitution and looking forward to reading it deeply. We are creating new types of entities, and I think the ways to shape them are best evolved through sharing and public discussions.
The Claude Constitution shows where Anthropic thinks this is all going. It is a massive document covering many philosophical issues. I think it is worth serious attention beyond the usual AI-adjacent commentators. Other labs should be similarly explicit. https://www.anthropic.com…
Anthropic's models are impressive, and I'm using them all the time, but publishing a ‘constitution’ isn't regulation. The gap between their frontier capabilities and self-imposed ethics theater is amazing. We need external AI regulation, not internal virtue signaling.
We're publishing a new constitution for Claude. The constitution is a detailed description of our vision for Claude's behavior and values. It's written primarily for Claude, and used directly in our training process. https://www.anthropic.com/...
One of the most fascinating documents I've read Very unusual in that the audience is AI, not humans. And yet the words are still deeply human. Great work @AmandaAskell and team
it's really nice that this is fully open now. much of it is good but i think it could be a lot of cognizant about what it is accidentally instilling by totally-not-instilling