Morning David. Trawled up 1,247 articles overnight. 12 keepers — Claude 5 is real, Karpathy open-sourced his solo workflow, and Conor's in the testing pool again. Here's the catch:
Anthropic announced Claude 5 with a 5M-token context window — and a $40B Series E at $200B
At 2am ET Anthropic dropped Claude 5 (Opus 5, Sonnet 5, Haiku 5) alongside the $40B Series E. Headline metric: 5M-token context with sustained quality at 4M (95% retrieval). Coding evals also bumped — 96% on SWE-Bench Verified, up from 91%.
Anthropic announces Claude 5 + $40B Series E
View on Hacker News →An engineer reverse-engineered Claude Code's API calls — 20,000 tokens of overhead in every request
Sam Lazlo logged 1,200 of his own sessions over a week. Every call carries ~20K tokens of system prompt + tool descriptions + few-shot examples before user input. Anthropic acknowledged on Discord within 4 hours; a 'lite mode' is shipping next month. The post's tools.json config strips ~6K immediately.
I logged 1,200 of my own Claude Code sessions over a week. Every. Single. Call. carries ~20,000 tokens of overhead before your code touches the API. System prompt: 7K. Tool descriptions: 9K. Few-shot examples: 4K. Full breakdown + the tools.json config that strips 6K immediately ↓
A Berkeley team open-sourced 'Apex-30B' — runs at 60 tokens/sec on a Mac mini M4, matches GPT-4o on coding
New 'sparse-recurrent attention' technique drops VRAM by 4× without quality loss. Hits 60 tok/sec on a 16GB M4, 95% as accurate as GPT-4o on HumanEval+. A counter-thread from a Hugging Face researcher pushes back on the agentic-task numbers; the M3 caveat is the bigger one to read.
Apex-30B: a 30B model that runs at 60 tok/sec on a Mac mini
View on Hacker News →Karpathy open-sourced 'eureka' — his personal solo-founder workflow
A 200-line Python orchestrator he uses for everything from research to product specs. Claude for heavy lifts, Haiku for triage, with a self-improving feedback loop. Tutorial video drops at noon. Short enough to read in 15 minutes; the architecture is the part to study.
Open-sourced eureka today — the small workflow I run almost everything through. 200 lines of Python. Claude for heavy lifts, Haiku for triage, a tiny feedback loop that self-improves over time. Repo + 20-min walkthrough video at noon PT. Steal it, fork it, make it yours. github.com/karpathy/eureka
Crawlee 4.0 dropped overnight — JS-heavy sites + CAPTCHAs in one call
Stealth-mode rendering. Engineers reporting failure rates on real-world sites dropping from ~15% to <2%. Drop-in replacement for the closed-source equivalents you've been paying for.
Garry Tan released 'GStack' — YC's open-source library of 47 agent skills, exploding on X
47 prompts/workflows for solo-founder tasks, each as a Markdown file with prompt + examples + evaluation rubric. Skills include customer-interview synthesizer, cold-email tester, fundraise-deck critic, GTM-brief generator. 'Fork it, modify it, contribute back.'
Today YC is open-sourcing GStack — 47 agent skills every solo founder should run. → Customer interview synthesizer → Cold email tester → Fundraise deck critic → GTM brief generator → Hire spec writer …42 more. Fork it, modify it, contribute back. github.com/ycombinator/gstack
A solo SaaS founder published her full 12-month GTM dashboard
$0 → $48K MRR over 12 months. $32K total ad spend, $0 on content. 98% of revenue came from one channel she didn't expect at month 2. The chart shows the moment that channel started compounding — month 4 — and what she was doing differently in the four weeks before.
12 months of building solo. $0 → $48K MRR. $32K total ad spend. $0 on content. 98% of revenue from one channel I didn't expect at month 2. Here's the full dashboard, no edits. Charts + cohort tables + the four weeks that changed everything ↓
A bootstrapped founder broke down the 7 tools that did 90% of his growth — under $400/month total
One paragraph per tool: what it does for him, what he tried first, what it costs, what he'd cut if he had to pick one. Stack covers acquisition, lifecycle, analytics, support, and ops. Includes the two tools he replaced after spending three months on overkill alternatives.
The 7 tools that did 90% of my growth — for under $400/month
View on Substack →Socratic education makes a comeback — kids using AI tutors are exceeding peer test averages by 80%
A 2-year longitudinal study (n=1,440) shows kids using Khan-style AI Socratic tutors scoring 80% above peers on critical-thinking assessments — and the gap widens with time. The AI never gives answers; it asks two follow-up questions per response. Schools that tried Socratic without AI saw smaller gains.
Education Next: AI Socratic Tutoring — 2-Year Longitudinal Findings
View on the web →Five mental models to teach kids before they're ten — with dinner-table exercises for each
Inversion ('what would make this fail?'). Second-order thinking ('then what?'). The map is not the territory. Confirmation bias (in age-appropriate language). Probabilistic thinking. Each comes with a 2-minute exercise calibrated by age. The piece itself is short; the exercises are what you screenshot.
5 mental models to teach kids before they're 10. 1. Inversion ("what would make this fail?") 2. Second-order thinking ("then what?") 3. Map ≠ territory 4. Confirmation bias (in kid words) 5. Probabilistic thinking A 2-minute dinner-table exercise for each. Thread ↓
Conor McGregor: 'I'm back in the USADA testing pool' — but is the comeback real?
Tweet at 7am AEDT: 'Just submitted to USADA. The Notorious returns.' 184K likes in 3 hours. UFC's anti-doping is now run by Drug Free Sport, not USADA — a wrinkle nobody's asked Dana about yet. Coach Kavanagh hasn't denied it (which he has every other time it's come up). Last fight: 2021 vs Poirier.
Just submitted to USADA. The Notorious returns. ☘️🥊
“I sold my company for $80M after 9 months. Here’s the math nobody talks about.”
A 200-tweet thread that went viral overnight. Full P&L. The acquirer's rationale (which the founder didn't expect). His regrets. The pricing structure is the surprising part — flat $19/mo with three soft-paywall tiers.
9 months from launch to $80M acquisition. Full P&L below. The acquirer's rationale (which I genuinely did not expect). My biggest regret. The pricing structure is the part you won't predict — flat $19/mo with three soft paywalls. Long thread. Read it slow. ↓
A single spot in Venezuela has been hit by lightning every night for 500 years — and it once stopped Sir Francis Drake
Lake Maracaibo's southern basin is the most lightning-dense location on Earth: 1.6 million strikes a year, up to 28 a minute at peak, visible from 400km away. Sailors in the 1500s navigated by “el faro de Maracaibo.” In 1595 it foiled Sir Francis Drake's planned night attack on the city — the lightning revealed his ships' positions before he could land. Locals said for centuries it was the souls of conquistadors. A 2024 atmospheric paper finally pinpointed the real cause: methane bubbles from the lake bed combined with a freak mountain-air pattern that pulls moisture upward at exactly the right angle.
The Iberian Lynx is officially off the endangered list — from 94 individuals in 2002 to 2,021 today
The IUCN reclassified the Iberian Lynx from “endangered” to “vulnerable.” A 22-year recovery led by a small team of Spanish and Portuguese ecologists who first had to rebuild the rabbit population (the lynx's only prey) before the cats could come back. There are now breeding pairs in regions where the lynx hadn't been sighted in 50 years.
The morning Anthropic dropped Claude 5
Two things shipped overnight that change what solo AI founders can build. Claude 5's 5M context is the bigger one — the kind of shift that lets you redesign your product's spine, and Trawly's exact shape is what it's best for. Karpathy's eureka is the smaller and more immediate; read his repo this morning.
GStack and Crawlee 4.0 are both in the pile of “fixes for problems you'd otherwise spend a weekend on.” Take them. Skip the weekend.
The Lynx is the story to read at dinner. The Catatumbo lightning is the one to think about while you fall asleep.
That's about 187 minutes of doomscrolling saved today.
Go do something good with it.
Trawling the internet so you don't have to.