Visiting Partner @ycombinator. Founder & former CTO & CEO @Shogun. Angel investor in 60 companies. Startups, the universe and everything. 🏴
Joined March 2009
- Tweets 5,046
- Following 866
- Followers 6,252
- Likes 12,446
328 Photos and videos
Jun 11
Another thing I'm noticing is Fable hallucinates files a lot. I thought we were well past that at this point?
3
131
Jun 11
Fable frequently stops mid work to offer options and talk about time trade-offs of how long things will take to implement. You're an AI model dude, it's all the same amount of work to me. Do the obviously good thing!
1
192
Jun 10
I'm finding that Fable still needs a lot of hand holding compared to Codex. Fable's training seems to be that humans are still required to make decisions, so it throws up these multiple choice prompts when the choice is already obvious. Codex would have just shipped it.
2
1
372
Jun 10
"Give me those plus a Stripe account and it's about a day of work" 🤣
Days pass very quickly in AI time.
278
Jun 10
Fable seems pretty great. I've been strong on Codex the last couple of months and this is a solid leap forward from Anthropic.
2
310
Jun 4
Looks like Mythos performs about the same as Opus 4.7 on claude code tasks:
anthropic.com/institute/recu…
1
5
383
May 25
Gemini has quietly developed a way better personality than ChatGPT. Just tried it again and was pleasantly surprised by its warmth and conciseness.
1
6
1,005
May 20
There are so many cool companies applying to YC. It's such a privilege to meet so many incredible founders and gives me great optimism about the future.
1
7
389
May 9
Happy 100th Birthday to David Attenborough. Absolute legend.
bbc.com/news/live/c759lwgevl…
1
3
943
May 8
Imagine playing credit card roulette with this beast. Double the gamble.
We created a card that sometimes doesn't charge you.
Buy Now, Pay Maybe.
Community note
The Tuyo card is a Visa debit card for spending USDC stablecoin. The "Buy Now, Pay Maybe" feature randomly covers some purchase costs, but probabilities are not disclosed. It is self-custodial, with no traditional banking protections like FDIC insurance.
apps.apple.com/us/app/tuyo-bu…
tuyo.com
4
2,102
May 5
12m context 52x faster. Impressive claims from SubQ.
The algorithms are going to get better and better. We’re still so early.
May 5
Introducing SubQ - a major breakthrough in LLM intelligence.
It is the first model built on a fully sub-quadratic sparse-attention architecture (SSA),
And the first frontier model with a 12 million token context window which is:
- 52x faster than FlashAttention at 1MM tokens
- Less than 5% the cost of Opus
Transformer-based LLMs waste compute by processing every possible relationship between words (standard attention).
Only a small fraction actually matter.
@subquadratic finds and focuses only on the ones that do.
That's nearly 1,000x less compute and a new way for LLMs to scale.
1
1
11
2,299
May 5
Two agents, one branch, zero dignity.
Three months into running multiple AI coding agents on the same project, here's what I learned about why it falls over and what to do about it.
finbarr.site/2026/05/05/trea…
3
6
29
7,276
May 5
Deep in application reading. I watched a youtube video from one team and forgot to close the tab after.
Came back an hour later to this unexpected and very wholesome live stream of some nesting storks with chicks in Bad Salzungen ❤️
youtube.com/watch?v=Dr5zebXp…
7
521
May 5
While I've been using Codex for most of my coding recently, Claude is still undefeated at writing. GPT tries but Claude just gets it.
1
7
738
May 5
Thanks @OpenAI! Shame there wasn't this much capacity for the party, but I appreciate it 😀
3
36
2,106
May 4
Deadline for YC S26 in a little over 24h. Excited to work with a bunch of amazing founders over the next few months!
May 4
The deadline to apply for the YC Summer 2026 batch is tomorrow, May 4th, at 8pm PDT!
Apply at ycombinator.com/apply.
6
3
81
21,257
May 1
I think it's pretty bad that OpenAI and Anthropic haven't gone public yet. There's huge innovation happening in America and most people in this country don't have any access to it. Instead all the value is accruing to big tech and late stage venture funds.
26
6
147
38,095