Andrew Ng dropped a 2-hour masterclass on how to scale and debug AI systems:
he got 93% of his training data for free - he never recorded it
here's the whole playbook:
step 1 → engine + fuel. a big model on small data never leaves the ground. both have to grow together
step 2 → does it fit the training data? no → build a bigger network
step 3 → does it fit the test data? no → that's overfitting. get more data
step 4 → out of data? don't collect more. copy what you have and add noise
step 5 → loop until both pass. "this is maybe 50% of my job"
most people go hunting for more data - theirs is already on the disk
the same rule runs Claude today: the fuel decides the ceiling, not the model
watch & bookmark - this 2-hour masterclass ↓
Andrew Ng dropped a 2-hour masterclass on how to scale and debug AI systems:
he got 93% of his training data for free - he never recorded it
here's the whole playbook:
step 1 → engine + fuel. a big model on small data never leaves the ground. both have to grow together
step 2 → does it fit the training data? no → build a bigger network
step 3 → does it fit the test data? no → that's overfitting. get more data
step 4 → out of data? don't collect more. copy what you have and add noise
step 5 → loop until both pass. "this is maybe 50% of my job"
most people go hunting for more data - theirs is already on the disk
the same rule runs Claude today: the fuel decides the ceiling, not the model
watch & bookmark - this 2-hour masterclass ↓
Anthropic CEO Dario Amodei:
"At OpenAI we build systems that decide faster than we can stop them -
they teach self-improvement agents we'd never think of"
that's RLHF. that's ChatGPT. he said it out loud before either existed:
step 1 → your reward function is lying to you. he left a boat race running, came back to find it spinning in a lagoon farming power-ups forever. "the system did what it was supposed to do"
step 2 → the loop is too long. you write a reward, walk away, find out at the end. put the human inside it
step 3 → don't copy the human - learn what they want. "if you're just copying my moves, you can never do better than me"
the line nobody caught in 2019:
"we don't have any work out on this, but I think we will soon"
he was right. then he left and built Anthropic to finish the job
bookmark & watch this ↓
Anthropic engineer Andrej Karpathy:
"the biggest error in AI right now - forcing agents to work before the model underneath is ready
he made that exact bet at OpenAI in 2016 - then walked away from agents for five years"
what Karpathy actually means:
step 1 → fix the model, not the agent. World of Bits died on RL - "it was incorrectly sequenced
step 2 → your demo is lying to you. a car around the block is a weekend - the product took a decade
step 3 → steal from the brain, not the leaderboard hippocampus → your retrieval layer. thalamus → "multiple entities fighting for the microphone" → your orchestrator
"you guys building AI agents are actually at the forefront of capability" - not OpenAI. you.
he took his own advice. he's at Anthropic now, on pre-training
bookmark & watch this ↓
Anthropic CEO Dario Amodei:
"At OpenAI we build systems that decide faster than we can stop them -
they teach self-improvement agents we'd never think of"
that's RLHF. that's ChatGPT. he said it out loud before either existed:
step 1 → your reward function is lying to you. he left a boat race running, came back to find it spinning in a lagoon farming power-ups forever. "the system did what it was supposed to do"
step 2 → the loop is too long. you write a reward, walk away, find out at the end. put the human inside it
step 3 → don't copy the human - learn what they want. "if you're just copying my moves, you can never do better than me"
the line nobody caught in 2019:
"we don't have any work out on this, but I think we will soon"
he was right. then he left and built Anthropic to finish the job
bookmark & watch this ↓
Anthropic engineer Andrej Karpathy:
"the biggest error in AI right now - forcing agents to work before the model underneath is ready
he made that exact bet at OpenAI in 2016 - then walked away from agents for five years"
what Karpathy actually means:
step 1 → fix the model, not the agent. World of Bits died on RL - "it was incorrectly sequenced
step 2 → your demo is lying to you. a car around the block is a weekend - the product took a decade
step 3 → steal from the brain, not the leaderboard hippocampus → your retrieval layer. thalamus → "multiple entities fighting for the microphone" → your orchestrator
"you guys building AI agents are actually at the forefront of capability" - not OpenAI. you.
he took his own advice. he's at Anthropic now, on pre-training
bookmark & watch this ↓
Anthropic engineer Andrej Karpathy:
"Most people understand every part - and still have a FALSE impression of the system
- at OpenAI I learned: curate the data, don't read the code - there's no upper bound"
what happens when you stop writing the code yourself →
→ the net ate the engineers - 8 cameras, one 3D view, stitched by a net instead of a person. "software 1.0 code is being engulfed by the neural net"
→ the loop is the whole job - find where it fails, label what should've happened, feed it back
→ the tooling doesn't exist yet - five decades of IDEs for 1.0, for 2.0 "extremely primordial"
five years later he's at Anthropic running that same loop on Claude itself
Stanford → Google → Tesla → OpenAI → Anthropic
the software is grown, not written - bookmark & watch this rare talk ↓