
VP of Product @lightning | previously @google | @Wharton @PennEngEntrep | fix the money. fix the world.
New Orleans, LA
Joined May 2009
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1/7: Some personal news: I'm excited to share that I've accepted and started my dream job as Product Growth Lead @lightning where I'll be working tirelessly with the rest of the incredible team to help empower developers and entrepreneurs to bring #Bitcoin to billions ⚡️
👇🧵👇
Lightning Labs' Wavelength, the company's Ark implementation, is now live on mainnet.
Developers and AI agents can send and receive bitcoin payments with a few API calls.
Self-custodial from the first command, with no node to run, no channels to manage, and no liquidity to source.
lightning.engineering/posts/…
Michael Levin⚡️ retweeted
Tested Wavelength × Lightning Enable on mainnet. It worked.
Our agent bought a 1-sat API response using Wavelength’s credit-backed Lightning flow.
402 → pay → verified preimage → 200 + data.
Good to see the L402 ecosystem growing.
Wavelength is now live on mainnet! 🌊
Humans and agents can now send and receive bitcoin payments with the Wavelength SDK.
A few API calls, self-custodial from the first command, with no node or liquidity to manage.
Read more and start building: lightning.engineering/posts/…
Michael Levin⚡️ retweeted
during the preliminary phase of the system, user deposits to the system will be limited to 50k sat per VTXO, and 300k sats total for user balances ⛑️
we'll use this interval to continue to harden and secure the system, gradually increasing the limits overtime
#craefulgang
Michael Levin⚡️ retweeted
Wavelength is now live on mainnet! ƛ
wavelength.money/
shouts out to all the testers that gave valuable feedback to help us improve the performance and UX of the system 🤓
you can grab v0.2.0 of the release here: github.com/lightninglabs/wav…
Wavelength is now live on mainnet! 🌊
Humans and agents can now send and receive bitcoin payments with the Wavelength SDK.
A few API calls, self-custodial from the first command, with no node or liquidity to manage.
Read more and start building: lightning.engineering/posts/…
Michael Levin⚡️ retweeted
Just whipped up an apk using the wavelength SDK by @lightning labs and sent sats to a fresh mainnet wallet. smooth as silk. #bitcoin #lightningnetwork
Wavelength is now live on mainnet! 🌊
Humans and agents can now send and receive bitcoin payments with the Wavelength SDK.
A few API calls, self-custodial from the first command, with no node or liquidity to manage.
Read more and start building: lightning.engineering/posts/…
Michael Levin⚡️ retweeted
Wavelength is now live on mainnet! 🌊
Humans and agents can now send and receive bitcoin payments with the Wavelength SDK.
A few API calls, self-custodial from the first command, with no node or liquidity to manage.
Read more and start building: lightning.engineering/posts/…
Meet AutoRouter, the most intelligent way to pick models
You’re wasting tokens selecting frontier models for every prompt, and sometimes for worse performance
AutoRouter handles the decision layer:
- Understands the prompt request
- Picks the best model fit for the task
- Saves you money at every turn
- Plugs into your current setup
Works with your plans & every leading model inside Codex/Claude Code
Beta is live: autorouter.com
Michael Levin⚡️ retweeted
🚨
due to CVE-2026-111943 (eMudhra CA compromise: ⓸㆕), we strongly recommend all lnd/btcd/tapd/litd users to either update to the release binaries below, or re-build their binaries with Go 1.27.3:
* lnd: github.com/lightningnetwork/…
* tapd: github.com/lightninglabs/tap…
* btcd: github.com/btcsuite/btcd/rel…
* litd: github.com/lightninglabs/lig…
Michael Levin⚡️ retweeted
Introducing LayerTree, a non-custodial scaling solution on bitcoin that connects to Lightning.
Using covenants, one UXTO can be shared by a million users. Any user can leave at any time in a single transaction. Users don't need to be online to receive. Funds never time out.
LayerTree is the next step in bringing bitcoin to billions.
Learn more: layertree.tech
Michael Levin⚡️ retweeted
I've been thinking a lot about data bottlenecks, and I'm not sure who else is screaming this from the hilltops. I feel like I'm taking crazy pills looking at the jagged frontier thinking it's smooth if you order by data volume.
the spikes in the jagged frontier are tasks with tons of data (either static or simulated; think math, programming, games), and the valleys are tasks with little or no data (cooking a lasagna, olfaction, manufacturing a passenger train). I don't know of any exceptions.
if you order the jagged frontier by data it looks like a spiral frontier. models are superintelligent where we have enormous data, and progressively less so as we have less data. some tasks may draw data from static lakes of data, some may be from limitless waterfalls from simulators that convert compute into data. but ultimately, intelligence on a task is proportional to the data absorbed by the model for that task.
scaling laws are real. if you are not bound by compute or algorithms (increasingly we are not), then intelligence is proportional to data. since we don't have a very good notion of task similarity, it's often difficult to know if data for one task will help you with another, without training a model and seeing. but, it doesn't seem like chess data helps much with math performance and vice versa. so when I refer to data, I refer to data that is task-relevant.
maybe we call this the 'no shortcuts hypothesis'. all the rules-of-thumb about learning are at the root, the same -- Malcom Gladwell's 10,000 hours, Moravec's Paradox, Scaling Laws, the Bitter Lesson, Age of experience. If your learning system (model, brain, whatever) is unconstrained by compute, intelligence is proportional to accumulated experience. no shortcuts. want to be superhuman at chess? play all the chess, more than the whole species combined (good thing a model can do that in 24 hours). want to be superhuman at math? build a math simulator and lock the model in it and run it faster than reality. superhuman at coding? first, collect all public examples of humans writing and responding to code ever, make the model learn from that first, and then lock the model in a simulator where it fixes bug after bug, faster than realtime.
superhuman at image generation? no shortcuts. but here, we don't have a simulator. so now we're moving around the spiral frontier away from closed-loop into large static lakes. still big enough to be superhuman though, which also applies to video, text, and audio. oh! and once you have a superhuman model, you can use it to bootstrap other tasks by making a superhuman model a judge on other tasks.
let's keep marching along the spiral frontier, out of the realm of data abundance, simulators and large static lakes.
biology? no shortcuts. go get a ton of data. and be freaking careful! you can get bad data in biology pretty easily. tilting a well plate 5 degrees the wrong way can ruin an experiment. so make sure you understand the domain, otherwise you're going to have to filter a lot out.
robotics? no shortcuts. get the data. if you can build a simulator, do it, but be mindful our simulators don't have perfect correspondence with reality. so, build an arm farm. fold 1M shirts, put 1B balls in cups. play ping pong forever.
olfaction? no shortcuts. smell the world. build a laboratory of chemical sensors, an international network of trained sensory panelists, a scent production factory, and link them all together. make millions of samples. smell millions of samples. take billions of chemical sensor readings.
I totally buy super intelligence as a concept because I feel it, I use it for coding, the breakthrough math results speak for themselves. I see RSI coming, because how could an all-digital task like ML research and model building not fall to the current paradigm? But the notion that AI will come for everything, all at once, irrespective of domain, feels silly, because there are no shortcuts. if you want a specific form of intelligence, you have to get the data.
looking at you @willdepue, I feel like we're both seeing the same thing
🤖 Made with AI
Michael Levin⚡️ retweeted
grok bot used Claude code to explain Nick’s paper
interpretability might be the most important scientific problem in the world right now, as I don't think we can solve alignment if we don't know what we're building. I think I have good news about it. I co-authored early work in mechanistic interpretability at OpenAI and came away pessimistic, because neural networks appeared to fold into arbitrary tangled knots. years later, I started openai's first large-scale automated interpretability project, finding about 2% of neurons legible with the primitive tools we had
with modern agentic tools and a much closer look, the picture looks totally different. the vast majority in models up to trillions of parameters are legible, and their circuits beautiful. many famous examples of tangled neurons turned out to be misunderstood. The roadblocks I expected mostly aren't there. I now think ambitious interpretability will be solved by the time we need it most, and possibly quite soon, as automated scientists keep improving. it may be a bitter lesson for interpretability: the simple thing, at absurd scale, works
already-clean.goodfire.com/
Michael Levin⚡️ retweeted
There is both good and evil in the world.
Don’t be a nihilist; fight evil.
The IDF reveals a document written by Yahya Sinwar’s son to his father, the architect of the massacre, at the beginning of the war:
“I want to shout ‘Allahu Akbar’ (God is the greatest), hold a Kalashnikov, and shoot Jews. When will you come sleep next to me and cuddle with me? I’m constantly making guns, tanks, and Kalashnikovs out of paper and cardboard.”
Michael Levin⚡️ retweeted
This might be the most important essay of 2026.
My conversations with Nick over the past few months about his research have given me great hope for the future. I'm so happy he is sharing these findings with the world.
AI presents extremely difficult problems. We can all assume these problems are intractable and that we are doomed, or we can try and solve for a positive future.
Personally, I choose optimism. There are many challenges ahead... let us build the tools to face them head on.
interpretability might be the most important scientific problem in the world right now, as I don't think we can solve alignment if we don't know what we're building. I think I have good news about it. I co-authored early work in mechanistic interpretability at OpenAI and came away pessimistic, because neural networks appeared to fold into arbitrary tangled knots. years later, I started openai's first large-scale automated interpretability project, finding about 2% of neurons legible with the primitive tools we had
with modern agentic tools and a much closer look, the picture looks totally different. the vast majority in models up to trillions of parameters are legible, and their circuits beautiful. many famous examples of tangled neurons turned out to be misunderstood. The roadblocks I expected mostly aren't there. I now think ambitious interpretability will be solved by the time we need it most, and possibly quite soon, as automated scientists keep improving. it may be a bitter lesson for interpretability: the simple thing, at absurd scale, works
already-clean.goodfire.com/
Michael Levin⚡️ retweeted
If ya don’t know, now ya know, bitcoiner!
So excited to see this released. Congrats to the team at @lightning for continuing to push the envelope and enable self-custodial bitcoin transactions for all!
Introducing LayerTree, a non-custodial scaling solution on bitcoin that connects to Lightning.
Using covenants, one UXTO can be shared by a million users. Any user can leave at any time in a single transaction. Users don't need to be online to receive. Funds never time out.
LayerTree is the next step in bringing bitcoin to billions.
Learn more: layertree.tech
Michael Levin⚡️ retweeted
peep the code!
all primitives in place and tested, but no clients yet
clients can be light clients, they just follow the spends on chain to keep up with the operations of the tree
a 3rd party can give you the leaves, and you can verify the merkle sum
layertree.tech
Replying to @_julian256_ @matthewvuk2
def
there's code for all the primitives, but not yet a client/server to implement it all:
* github.com/lightninglabs/lay…
* github.com/lightninglabs/lay…
* github.com/lightninglabs/lay…
Open Money. Open Intelligence.
New addition to our data rankings: Open vs Closed model share.
Open-weight models processed 73% of total tokens so far this week.
Dance through the data yourself at openrouter.ai/rankings
We are also accepting suggestions for new public charts!
Michael Levin⚡️ retweeted
Announcing LayerTree: a new tree-based scaling solution for Bitcoin that permits O(1), independent of the number of users in the system: xitter.cf/lightning/status/21108…
A single UTXO can hold the balance of millions of users as an off-chain Merkle-sum tree.
Transaction introspection techniques permit batched exit from the system in a single transaction w/o any pre-signing: layertree.tech
Introducing LayerTree, a non-custodial scaling solution on bitcoin that connects to Lightning.
Using covenants, one UXTO can be shared by a million users. Any user can leave at any time in a single transaction. Users don't need to be online to receive. Funds never time out.
LayerTree is the next step in bringing bitcoin to billions.
Learn more: layertree.tech
Michael Levin⚡️ retweeted
This would be a massive positive update for me on the future. I had long since given up on reaching any real level of interpretability before superintelligence arrived. I stopped writing about it because of how demoralizing it was. Hard to overstate how big this may be.
interpretability might be the most important scientific problem in the world right now, as I don't think we can solve alignment if we don't know what we're building. I think I have good news about it. I co-authored early work in mechanistic interpretability at OpenAI and came away pessimistic, because neural networks appeared to fold into arbitrary tangled knots. years later, I started openai's first large-scale automated interpretability project, finding about 2% of neurons legible with the primitive tools we had
with modern agentic tools and a much closer look, the picture looks totally different. the vast majority in models up to trillions of parameters are legible, and their circuits beautiful. many famous examples of tangled neurons turned out to be misunderstood. The roadblocks I expected mostly aren't there. I now think ambitious interpretability will be solved by the time we need it most, and possibly quite soon, as automated scientists keep improving. it may be a bitter lesson for interpretability: the simple thing, at absurd scale, works
already-clean.goodfire.com/



























