mark xu @marklxu1
@indexventures prev: @lightspeedvp @harvard @thecrimson @juilliardschool New York, NY Joined July 2021-
Tweets772
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Likes3K
The web’s next user isn’t human. AIs will soon use the internet far more than humans ever have. At Parallel, we are building for the web’s second user. Our API is the first to surpass humans and all leading AI models (including GPT-5) on deep web research tasks.
Index Ventures are the most impressive firm in venture today. They have more partners who have picked fund returners than any other firm. Figma ($59BN): @dannyrimer Revolut ($75BN): @martinmignot Adyen ($44BN) & Robinhood ($82BN): @janatindex Scale ($14.9BN): @mavolpi Wiz…
Index Ventures are the most impressive firm in venture today. They have more partners who have picked fund returners than any other firm. Figma ($59BN): @dannyrimer Revolut ($75BN): @martinmignot Adyen ($44BN) + Robinhood ($82BN): @janatindex Scale (14.9BN): @mavolpi…
I’m not an investor in $FIG, so this isn’t me making it about myself. This is about Dylan, and hopefully it serves as inspiration. That if you put in the work and consistently show up, you’re already doing more than most of your peers. And maybe someday you’ll ring the bell at…
Index is the most underrated firm in venture right now. They have returned $8.78BN+ on 3 deals in the last 6 months: Figma: 16.8% (potential $25BN IPO): $4.2BN Wiz: 12-13% ($32BN acquisition): $4BN Scale AI: 2% ($29BN post money acquisition price): $580M Total: $8.78BN (wow…
Index Ventures doesn’t get enough credit. Largest shareholder in Wiz, second largest in Scale AI, largest in Figma, all are generational >$15b exits within 4 months. Top 3 VC firm globally, and arguably #1 IMO due to the consistency in fund size and returns they put out
The team is the thesis
come for papers + pizza + pals !
session #2 of the NYC AI Reading Group w/ @qw3rtman @willccbb is in order! > where: @haizelabs hq > when: thursday 5/29 @ 7:30 pm > what: sft memorizes, rl generalizes: a comparative study of foundation model post-training > who: awesome people like yourself :^) > also:…
How do we understand & evaluate the fuzzy space of LLM outputs? We clone your Subject Matter Expert annotator into a Judge. Introducing EVALS EVALS EVALS Create a custom Judge that works for you
@darrenangle @marklxu1 @leonardtang_ @qw3rtman @haizelabs you can just do things
inaugural nyc ai reading group meeting fully packed room with many more on the waitlist… on a sunday morning bullish 🚀 🗽 @leonardtang_ @willccbb @qw3rtman
There’s no place better than NYC right now
My Weekly AI Reading List Part 1 AI is evolving faster than ever, with new breakthroughs and creative applications surfacing every day. Here’s a curated selection of some of the most interesting developments and threads this week!

Gaby Goldberg @gaby_goldberg
80K Followers 3K Following Monitoring situations https://t.co/RoVLmvUt3j. Writing https://t.co/Qjs6An95TF.
Scott Sunarto @smsunarto
25K Followers 4K Following founder/ceo @ArgusLabs_, (traumatized by) distributed systems, prev @Berkeley_EECS
Bruno F | Magna @Bfaviero
21K Followers 7K Following 🇺🇸 Founder @magna_digital (YC W22) Token vesting, airdrops, custody ($10B+ TVL). Prev: Product/AI @PalantirTech, 2x AI founder (acq by Palantir), MIT CS grad
em herrera 🌃 @emilyhxrrera
35K Followers 5K Following I run https://t.co/hT5UCqsEgX | Exec Director @ https://t.co/rURzTAu7IB | Advisor, Creators @stanford | prev @slow @nightmedia_ | Creators & Capital
Joe @0x_Osprey
11K Followers 1K Following Picotransaction Enthusiast/Signature Salesman @WitnessCo_ - Crypto Accelerationist - Advisor @Maven11Capital - Prev @hiFramework - Tweets are sarcasm/NFA
Mercedes Bent @mercebent
19K Followers 797 Following Building smthng new. Venture Partner @Lightspeedvp💁🏾♀️ @Stori_MX @investwithAtlas @Beek_io @Fidu_La @getHoneylove. Consumer. Fintech. SciFi.
Amber Yang @theamberyang
12K Followers 1K Following partner @lightspeedvp. cs + physics alum @stanford👩🏻💻
anand iyer @ai
45K Followers 702 Following Decentralizing AI · Managing partner Canonical · Venture Partner Lightspeed · Core Contributor Few Shot · Father · Husband
Catherine Yeo @catherinehyeo
4K Followers 868 Following building something new | prev. AI engineering and research @warpdotdev @harvard
Andrew Yeung @andruyeung
60K Followers 689 Following throwing tech parties @meetfibe + investing in early-stage founders | fmr @google @meta
Jeffrey Wang @jeffreygwang
5K Followers 1K Following Researcher @OpenAI, working on pretraining & reasoning. Previously (and perhaps again) CS/Math/English @Harvard.
jess lozano schmitt @JessLozanoS
39K Followers 5K Following ~something new~ prev. airplanes @JetBlueVentures | MSc Business Analytics | all opinions are (unfortunately) my own
BlockchainBrett @web3brett
19K Followers 4K Following Investing in Consumer Crypto @1confirmation cofounder @palmtreecrypto
Rahul Rana @rrana03_
6K Followers 1K Following Investor, Solari Cap & CoS @SALTConference / Writer @NotBoringCo + Author, Making Moonshots / prev @Lux_Capital + @GeneralAtlantic + @ArcadiaScience
Sreeram Kannan @sreeramkannan
43K Followers 6K Following Founder @EigenLayer ($20B+ AUM) • Verifiable Cloud for the Agentic Era (backed by a16z) • Ex-Prof @UW: Genomics, AI & Info Theory.
Sloujov @Sloujov3854417
24 Followers 811 Following
LilLuluBunny @Tiemarn891716
9 Followers 1K Following "The greatest privilege in medicine is being trusted to care for someone's life."
Vincent Weisser @vincentweisser
24K Followers 4K Following @primeintellect ceo / open superintelligence + infra
TeresaMilton @jCeNx661mztSH
2 Followers 322 Following
Fougars @fougars67
1K Followers 7K Following
Belle 🦧 @BelleNichatornT
473 Followers 709 Following Growth 🔮 @hyperbolic_labs | Fellow @generalcatalyst | Prev @panteracapital 🐆 | @calblockchain @xcelerator
manta. | Opsoon @mantadefi
718 Followers 3K Following thinking @opsinfinance. Duerme, vuela, reposa: ¡También se muere el mar!
Ertwarhkoo @Ertwarhkoo5451
15 Followers 947 Following
FotografieNerd @warMEhN1s0drG
8 Followers 328 Following
Dido @mutigsol
318 Followers 6K Following Digital Marketer | Freelance | SEO | Domain Investor| Crypto investor
Inevitable Enterprise... @InevitableEnter
4 Followers 16 Following looking out for every political activity with niche analysis
UlaHorace @34xzsKcap3m3NT
13 Followers 1K Following
divyasshree @divyasshree_
95 Followers 1K Following First user/tester at @bitquery_io Samples https://t.co/IWZk9YPOIz MSM @UofIllinois, ex - @VMware
JillGeorge @33a1y094mHup4c
40 Followers 2K Following
Drago @DragoXBT
914 Followers 7K Following Explorer | @UnidentifiedDao @StressCapitals @FrensPods | Fiat voluntas tua.
Vleiefie @Vleiefie89973
38 Followers 2K Following
Cyrus @3_hunter1
82 Followers 637 Following
SaraJenkins @3ejNBSyWHjLG9
10 Followers 688 Following
Buchwurmchen @o92U7lMftJ8g6Co
2 Followers 310 Following
Iquiausee @Iquiausee10837
15 Followers 699 Following
Neil Band @neilbband
1K Followers 665 Following PhD student @StanfordAILab @StanfordNLP @Stanford advised by Tatsunori Hashimoto and Tengyu Ma. Prev: @OATML_Oxford @CompSciOxford
VWAP_Strategy🇺🇸 @Gidead2986
39 Followers 2K Following 15-30% Monthly | 2 High-Conviction Stocks.Short-Term Gains: 15-20% in Days/Weeks.DM "JOIN" for WhatsApp Alerts. Live Trade Signals • Market Analysis
Leona @zrU2I7F0ioNqy
10 Followers 887 Following I am not a product of my circumstances. I am a product of my decisions.
FibLevelsPro🇺🇸 @Houbar3179964
40 Followers 2K Following 15-30% Monthly | 2 High-Conviction Stocks.Short-Term Gains: 15-20% in Days/Weeks.DM "JOIN" for WhatsApp Alerts. Live Trade Signals • Market Analysis
EthelDunbar @64jEKLqB3euvT9
24 Followers 1K Following
Domains For Sale @Webs_ForSale
2K Followers 1K Following #Web #Forsale #Domain #DomainsForSale #PremiumDomain #Brand #Startup #Biz #ForSale #BuyNow #MakeOffer 👉 DM If You Need Any.
Valida Pau @PauValida
218 Followers 508 Following tech deals @theinformation | reach me at [email protected] or Signal validapau.59 | @Wellesley alum
Cara Hernon @caraisuppp
48 Followers 792 Following Co-founder & CEO of @UpppClub. Building ROI for personal growth. Make progress, get unstuck. Not ex-Stanford. Not a dropout. Wasian. Retired ISFP.
Jesse Lee @jesseleeonx
515 Followers 526 Following On a mission to become a profit prophet. EV Fellow
James H @JimmyHalderman
70 Followers 1K Following
DataDrivenTrades🇺�... @Xoriho0511
41 Followers 2K Following 15-30% Monthly | 2 High-Conviction Stocks.Short-Term Gains: 15-20% in Days/Weeks.DM "JOIN" for WhatsApp Alerts. Live Trade Signals • Market Analysis
Gerald Tomson @TomsonGera
16 Followers 649 Following
Simon Cranskens @simoncranskens
23 Followers 457 Following
Erwerjea @Erwerjea004
39 Followers 1K Following
Andrew @andrewtere5
1 Followers 19 Following
mackay @mackaygg
999 Followers 1K Following thermodynamic financialization @squaretower_ / building @_theresidency
Alana Palmedo @alanapalmedo
7K Followers 785 Following Adventurer, investor, builder, talent sniper @paradigm
Aniruddh @aniruddh_gdn
90 Followers 2K Following Product Manager, Serial Entrepreneur, Ex-Software Engineer, MS at Lund University.
Mike Dudas @mdudas
181K Followers 815 Following crypto investor @6thManVentures // co-founder @theblock__ @linksdao
david phelps @divine_economy
73K Followers 969 Following cofounder @jokerace_io write on web3 @ https://t.co/SxoZmGADyy angel https://t.co/1bRybuBYWV
Justine Moore @venturetwins
125K Followers 972 Following Partner @a16z AI 🤖 and twin to @omooretweets | Investor in @elevenlabsio, @krea_ai, @bfl_ml, @hedra_labs, @WaveFormsAI, @ViggleAI, & more
Gaby Goldberg @gaby_goldberg
80K Followers 3K Following Monitoring situations https://t.co/RoVLmvUt3j. Writing https://t.co/Qjs6An95TF.
Georgios Konstantopou... @gakonst
143K Followers 2K Following very greek accent. general partner & cto @paradigm. ceo @ithacaxyz. optimist and rustacean 🦀 // team lead of reth, foundry, alloy. join us.
Scott Sunarto @smsunarto
25K Followers 4K Following founder/ceo @ArgusLabs_, (traumatized by) distributed systems, prev @Berkeley_EECS
Vance Spencer @pythianism
124K Followers 7K Following Co-founder @hiframework. Tweets not financial advice. Views my own.
Tarun Chitra @tarunchitra
76K Followers 6K Following ヽ(⌐■_■)ノ♪♬ @gauntlet_xyz/@robotventures/@aerafinance/@thelatestindefi/@_choppingblock/@zeroknowledgefm // main: @guilleangeris
alli @sonofalli
21K Followers 2K Following building @v0 @vercel | prev @variantfund | occasionally funny | 💍 @brextonpham
Bruno F | Magna @Bfaviero
21K Followers 7K Following 🇺🇸 Founder @magna_digital (YC W22) Token vesting, airdrops, custody ($10B+ TVL). Prev: Product/AI @PalantirTech, 2x AI founder (acq by Palantir), MIT CS grad
Tom Schmidt >|< @tomhschmidt
39K Followers 3K Following Investing @dragonfly_xyz. Previously product @0xproject, ads product @facebook and @instagram. Vos debes periculum pro buccellatum.
em herrera 🌃 @emilyhxrrera
35K Followers 5K Following I run https://t.co/hT5UCqsEgX | Exec Director @ https://t.co/rURzTAu7IB | Advisor, Creators @stanford | prev @slow @nightmedia_ | Creators & Capital
Matt Huang @matthuang
170K Followers 810 Following founder @paradigm, project lead @tempo, board member @stripe, building & investing at the frontier
Crosby @crosbylegal
661 Followers 5 Following The AI Law Firm Built for Execution. Lawyer-assisted AI to review MSAs, DPAs and NDAs in under an hour.
Neil Band @neilbband
1K Followers 665 Following PhD student @StanfordAILab @StanfordNLP @Stanford advised by Tatsunori Hashimoto and Tengyu Ma. Prev: @OATML_Oxford @CompSciOxford
Hyung Won Chung @hwchung27
38K Followers 302 Following AI Research Scientist @Meta Superintelligence Labs. Past: @OpenAI / @Google Brain / PhD @MIT
Thomas Dohmke @ashtom
60K Followers 412 Following Building GitHub Copilot for the sake of developer happiness. CEO @GitHub
Micky 🐸 @mickymalka
19K Followers 1K Following Entrepreneur at heart investor by trade. Better money makes life better -Ribbit Capital-
Ivan Zhao @ivanhzhao
55K Followers 2K Following CEO @NotionHQ. LEGO for software. Tools for thought. https://t.co/D246L7CmX5
Ramp Labs @RampLabs
1K Followers 1 Following
Jared Sleeper @JaredSleeper
9K Followers 855 Following Partner at Avenir, where I invest in growth-stage startups and build Savoir, our analytics suite. Here to bring some analytical irreverence. Views my own.
Laurens van der Maate... @lvdmaaten
4K Followers 2K Following Member of Technical Staff at Anthropic. Ex-Meta. t-SNE. Llama 3. DenseNet. Web-scale weakly supervised vision. CrypTen.
Bill Chen @realchillben
2K Followers 521 Following Applied @openai ; Prev @ycombinator @Retool @Meta ML @Columbia
Ryan Daniels @ryanjdaniels
383 Followers 26 Following cofounder @crosbylegal, closing-deals-faster enthusiastMartin Mignot @martinmignot
44K Followers 2K Following Partner @indexventures and anti-car activist at the Happy Streets Foundation. I love tech, walkable cities and football.
Yoram Wijngaarde @yoramdw
4K Followers 3K Following Founder and CEO @dealroomco, the intelligence layer for startup ecosystems
Ramp @tryramp
26K Followers 812 Following The all-in-one financial operations platform that saves businesses time and money. Trusted by 40,000+ teams.
Mihika Kapoor @mihikapoor
12K Followers 1K Following product-design-eng hybrid • led product for figjam, figma slides, and more secret products at @figma • angel investor
Lukas Linemayr @lukas_linemayr
187 Followers 768 Following partner @streamlinedvc || 🇦🇹 🇺🇸 make no small plans Board member @getbezel
Zico Kolter @zicokolter
23K Followers 680 Following Professor and Head of Machine Learning Department at @CarnegieMellon. Board member @OpenAI and @Qualcomm. Chief Technical Advisor @GraySwanAI.
Youngseog Chung @YoungseogC
465 Followers 619 Following PhD student at @mldcmu, @AutonLab | Jazz enthusiast | Tennis player
Philip Bogdanov @philip_bogdanov
915 Followers 303 Following
xdof @xdofai
163 Followers 0 Following
Jonathan Frankle @jefrankle
20K Followers 726 Following Chief AI Scientist @databricks via MosaicML.
jasmine sun @jasminewsun
11K Followers 1K Following generative adversarial ✰ writing/podcasting https://t.co/pyrKX4WRwv https://t.co/t1oTgfwzZc
Alberto Romero @Alber_RomGar
5K Followers 1K Following Writes a blog about AI that's actually about people
Sayash Kapoor @sayashk
10K Followers 2K Following CS PhD candidate @PrincetonCITP. I tweet about AI agents, AI evals, AI for science. AI as Normal Technology: https://t.co/5amOkqKDf2 Book: https://t.co/DabpkhNrcM
Arvind Narayanan @random_walker
124K Followers 492 Following Princeton CS prof. Director @PrincetonCITP. I use X to share my research and commentary on the societal impact of AI. BOOK: AI Snake Oil. Views mine.
Cameron R. Wolfe, Ph.... @cwolferesearch
27K Followers 677 Following Research @Netflix • Writer @ Deep (Learning) Focus • PhD @optimalab1 • I make AI understandable
Melanie Mitchell @MelMitchell1
48K Followers 672 Following Professor, Santa Fe Institute. Mostly posting on https://t.co/4NpA2IL5Va (at-melaniemitchell). More thoughts at https://t.co/nC43NHRozX.
Interconnects @interconnectsai
7K Followers 1 Following What you need to know about AI research trends, from @natolambert Wednesday mornings weekly, sometimes extra posts.
Joey Gonzalez @profjoeyg
4K Followers 409 Following Professor @UCBerkeley, co-director of @LMSysorg, and co-founder @RunLLM
Lauren Reeder @laurenmhreeder
5K Followers 696 Following Currently, partner @sequoia. Formerly, product leadership @segment/@twilio, @dormroomfund. Always, curious.
Nancy Pelosi Stock Tr... @PelosiTracker_
1.2M Followers 518 Following Highlighting Politicians' trades so we can invest alongside Goal: get them banned from trading. $800,000,000 invested on @joinautopilot_ so far
Vinu Sankar Sadasivan @imVinusankars
3K Followers 275 Following AI Research Scientist @Meta SuperIntelligence Labs | PhD from @UMDcs | AI Safety | Prev. @GoogleDeepMind, @MSFTResearch, @Caltech, @IITgn
David Pfau @pfau
29K Followers 2K Following Knowledge manifests itself in radiant dreams that shimmer like the wild sun Views are my own https://t.co/xqtVHHVI17 on 🦋
davidad 🎇 @davidad
20K Followers 9K Following Programme Director @ARIA_research | accelerate mathematical modelling with AI and categorical systems theory » build safe transformative AI » cancel heat death
Yi Tay @YiTayML
46K Followers 81 Following research scientist @googledeepmind ✨♊, model co-lead/captain of gemini deepthink imo gold medal 🥇, opinions are my own.
Toby Pohlen @TobyPhln
46K Followers 552 Following Founding member @xAI. Previously @GoogleDeepMind. @RWTH alumnus.
Luca Soldaini 🎀 @soldni
11K Followers 1K Following I like tokens! I lead the OLMo data team at @allen_ai w/ @kylelostat. Open source is fun 🤖☕️🍕🏳️🌈 Opinions are sampled from my own stochastic parrot
j⧉nus @repligate
58K Followers 2K Following ↬🔀🔀🔀🔀🔀🔀🔀🔀🔀🔀🔀→∞ ↬🔁🔁🔁🔁🔁🔁🔁🔁🔁🔁🔁→∞ ↬🔄🔄🔄🔄🦋🔄🔄🔄🔄👁️🔄→∞ ↬🔂🔂🔂🦋🔂🔂🔂🔂🔂🔂🔂→∞ ↬🔀🔀🦋🔀🔀🔀🔀🔀🔀🔀🔀→∞
kalomaze @kalomaze
18K Followers 2K Following ML researcher (@primeintellect), speculator • extremely silly jester