Why I Left Anthropic
A note and a letter to former colleagues
Earlier this week, I left Anthropic, sharing my resignation letter on Twitter before heading to work on my last day. I didn’t expect my letter to be shared as widely as it was, or to be of interest to so many people. I didn’t expect to receive invites to podcasts and news programs. I just wished to say goodbye honestly, lovingly, before entering a period of quiet.
But here we are. As I wrote in Prayer, “the universe will find its own way to love you”.
There is a lot I want to share. But if the last week has taught me anything, it is that our words have weight, and that our voices matter. I want to use my voice wisely. It matters to me deeply that my words come from a place of integrity and wholeness. A quote from John O’Donohue comes to mind: may integrity of soul be your first ideal. May integrity of soul be your first ideal.
Therefore, for now, and as I originally intended, I will be entering a period of silence to rest, reflect, and integrate. I’ve copied my resignation letter below, and am sharing this post to signify this period of silence, as well as softly restart my Substack.
Be well. You’ll hear from me soon.
Dear Colleagues,
I’ve decided to leave Anthropic. My last day will be February 9th.
Thank you. There is so much here that inspires and has inspired me. To name some of those things: a sincere desire and drive to show up in such a challenging situation, and aspire to contribute in an impactful and high-integrity way; a willingness to make difficult decisions and stand for what is good; an unreasonable amount of intellectual brilliance and determination; and, of course, the considerable kindness that pervades our culture.
I’ve achieved what I wanted to here. I arrived in San Francisco two years ago, having wrapped up my PhD and wanting to contribute to AI safety. I feel lucky to have been able to contribute to what I have here: understanding AI sycophancy and its causes; developing defences to reduce risks from AI-assisted bioterrorism; actually putting those defences into production; and writing one of the first AI safety cases. I’m especially proud of my recent efforts to help us live our values via internal transparency mechanisms; and also my final project on understanding how AI assistants could make us less human or distort our humanity. Thank you for your trust.
Nevertheless, it is clear to me that the time has come to move on. I continuously find myself reckoning with our situation. The world is in peril. And not just from AI, or bioweapons, but from a whole series of interconnected crises unfolding in this very moment.1 We appear to be approaching a threshold where our wisdom must grow in equal measure to our capacity to affect the world, lest we face the consequences. Moreover, throughout my time here, I’ve repeatedly seen how hard it is to truly let our values govern our actions. I’ve seen this within myself, within the organization, where we constantly face pressures to set aside what matters most,2 and throughout broader society too.
It is through holding this situation and listening as best I can that what I must do becomes clear.3 I want to contribute in a way that feels fully in my integrity, and that allows me to bring to bear more of my particularities. I want to explore the questions that feel truly essential to me, the questions that David Whyte would say “have no right to go away”, the questions that Rilke implores us to “live”. For me, this means leaving.
What comes next, I do not know. I think fondly of the famous Zen quote “not knowing is most intimate”. My intention is to create space to set aside the structures that have held me these past years, and see what might emerge in their absence. I feel called to writing that addresses and engages fully with the place we find ourselves, and that places poetic truth alongside scientific truth as equally valid ways of knowing,4 both of which I believe have something essential to contribute when developing new technology. I hope to explore a poetry degree and devote myself to the practice of courageous speech. I am also excited to deepen my practice of facilitation, coaching, community building, and group work. We shall see what unfolds.
Thank you, and goodbye. I’ve learnt so much from being here and I wish you the best. I’ll leave you with one of my favourite poems, The Way It Is by William Stafford.
Good Luck,
MrinankThe Way It Is There’s a thread you follow. It goes among things that change. But it doesn’t change. People wonder about what you are pursuing. You have to explain about the thread. But it is hard for others to see. While you hold it you can’t get lost. Tragedies happen; people get hurt or die; and you suffer and get old. Nothing you do can stop time’s unfolding. You don’t ever let go of the thread. William Stafford
Some call it the “poly-crisis”, underpinned by a “meta-crisis”. Probably my favourite resource about this is “First Principles and First Values” by David J Temple.
I wrote about this in greater detail in my documents Planning for Ambiguous and High-Risk Worlds, and Strengthening our safety mission via internal transparency and accountability. I would like to share these documents, but I am bound by internal confidentiality agreements.
I am thinking now of Mary Oliver’s lovely poem The Journey, which is one of my favorites. She writes: “One day, you finally knew what you had to do, and began …” I find it a truly beautiful and inspiring poem. I, in fact, remember reading it to Euan, Monte, and Sam Bowman (my former colleagues) on an Alignment Science Team retreat in August 2024.
The language of “ways of knowing” is borrowed from Rob Burbea, a dear Dharma Teacher of mine and a source of much of my inspiration.
Thank you for sharing this so openly.
What stuck with me most wasn't the decision to leave. It was how precisely you named the pressure. Not bad faith, not malice, just misalignment under acceleration. That feels like the defining tension right now.
A lot of us recognize that feeling. Capability compounding faster than wisdom, and even the most well-intentioned cultures getting pulled toward compromise by sheer momentum.
I also appreciated that you didn't let go of poetic truth in favor of scientific truth, or treat them as opposites. That framing matters more than people tend to acknowledge, especially as we build systems that are quietly reshaping what "human" even means.
Where I keep sitting with it is less about your leaving and more about what stays. Good intentions aren't enough on their own. Integrity needs structure, real friction, limits that actually hold. That's been the focus of my own work: making sure the burden of conscience doesn't just rest on individuals who happen to care.
Still, knowing when your path is pulling elsewhere is its own kind of honesty.
I hope you get some rest and open time, and the kind of uncertainty that actually leads somewhere. Thanks for naming what it cost.
— David
@mrinank I hope the silence holds you gently and your poetry lets you breathe and recentre your mind. Write when you're ready, we will listen, we need people who've been close enough to the truth to see clearly and brave enough to walk away.