Matt Knight @embeddedsec
VP @OpenAI United States Joined March 2015-
Tweets619
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Followers5K
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Following503
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Likes2K
Congratulations to Team Atlanta for winning @DARPA and @ARPA_H’s AI Cyber Challenge. @OpenAI models were their top three! #aixcc
Introducing GPT-5 Our best AI system yet, rolling out to all ChatGPT users and developers starting today. openai.com/index/introduc…
gpt-oss is out! we made an open model that performs at the level of o4-mini and runs on a high-end laptop (WTF!!) (and a smaller one that runs on a phone). super proud of the team; big triumph of technology.
What do you want to create next?
Excited to give the closing keynote at the @BlackHatEvents AI Summit in one hour. Come learn about how we’re equipping the security team with LLMs @OpenAI.
Had a blast discussing LLMs, security, and LLM security with fellow generative AI security pals @vijaybolina @JasonDClinton and @a16z’s Joel de la Garza: a16z.com/podcast/securi…
shoutout to @zemnmez for handling this report, coming up with the fixes, and managing the disclosure. bugcrowd.com/openai if you want to help us secure our products!
shoutout to @zemnmez for handling this report, coming up with the fixes, and managing the disclosure. bugcrowd.com/openai if you want to help us secure our products!
I've been getting to know Bluetooth recently, and it is a scary place :) github.com/skysafe/reblog…
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Still can't believe we won the black badge @defcon! Couldnt have been done without my awesome team WhatTheFreq! Thank you @rfhackers for putting on an awesome CTF.
Book signing of "Practical IoT Hacking" with co-authors @calderpwn and @beauwoods - @nostarch booth @defcon
Dear friends, Reverse Rett San Francisco charity gala is tomorrow! A few tickets left. If you're in SF, we would love to see you (JAX Vineyards 2-6pm). If not, our daughter Maya & all girls with Rett would greatly appreciate your support in finding a cure reverserett.org/events/reverse…

Pieter Ibelings @ibelings
16K Followers 10K Following Physicist, Engineer, N4IP, Antennas, Space Systems, SDR, RF, RADAR , Phased Arrays, Satellites, PCB Design 🇺🇸🇪🇸🛰️
Daniel Estévez @ea4gpz
10K Followers 401 Following Everything space & RF. Amateur radio operator (EA4GPZ / M0HXM). PhD in Mathematics from @Matematicas_UAM. he/him
Travis Goodspeed @travisgoodspeed
26K Followers 4K Following Merchant of Dead Trees and Licensed Proselytizer of the Gospel of the Weird Machines with Pwnage, PoC, and Secular Rock.
IanJohnBuckley @IanJohnBuckley
1K Followers 733 Following ASIC/FPGA design, dumpster fires, open source, SDR+HDR, Spaaaaace, cybersecurity, and other mad stuff.
Cybergibbons 🚲🚲... @cybergibbons
48K Followers 3K Following Andrew Tierney. Head of hardware. IoT hacker. Proud resident of Hounslow. Full on Alpha Male.
Bastian Bloessl @bastibl
2K Followers 562 Following Research Group Leader @ Secure Mobile Networking Lab, TU Darmstadt; General Assembly @ GNU Radio; Maintainer @ FutureSDR
Luigi Cruz @luigifcruz
4K Followers 956 Following Computer Engineer. Radio Amateur (PU2SPY). I talk about SDR, Raspberry Pi, Machine Learning, Parallel Computing, Satellites, Python, C++, and Golang.
LaForge - @LaF0rge@ch... @LaF0rge
6K Followers 1K Following #Osmocom founder. Mobile Communications expert, former netfilter/iptables hacker, freedom fighter. Nerd. Mensch mit Kommandozeilenhintergrund. #retronetworking
Brendan Dolan-Gavitt @moyix
30K Followers 6K Following Building offsec agents: https://t.co/G9EtnC2Gl3 PGP https://t.co/3WXr0RfRkv
𝙐𝙎𝘼 𝙎𝙖... @usa_satcom
13K Followers 441 Following Satellite Communications. GOES (HRIT/GRB/SUVI), HRPT, Inmarsat, L/S/X/Ku-Band, DSN, Astronomy, Whiskey, Endurance Running, Adventure Racing, Climbing.
John Hammond @_JohnHammond
298K Followers 3K Following Cybersecurity Researcher @HuntressLabs || Just Hacking Training @JustHackingHQ w/ @ethicalhacker || https://t.co/UtsNJiyQtS || https://t.co/narO3sz7y6
Justin Elze @HackingLZ
65K Followers 5K Following CTO @TrustedSec | Former Optiv/SecureWorks/Accuvant Labs/Redspin | Race cars
Andre @AndrePuschmann
1K Followers 429 Following srsRAN maintainer, father^2, photographer, music lover, coffee addict.
Aaronia AG @Aaronia_AG
16K Followers 16K Following Manufacturer of RF monitoring, direction finding, real-time spectrum analyzer, SDR, CUAS, IQ vector signal generator, network-analyzer, antennas, software & OEM
devnulling @devnulling
1K Followers 903 Following
UHF Satcom 🇬🇧 �... @uhf_satcom
20K Followers 706 Following Monitoring VHF to EHF 📡🛰️since Y2K. Microwaves / CNC / Electronics / Computers / Hacking / InfoSec - Ham Call M0EYT. Politics = instant unfollow + block 📻⚡️
Abraxas3d (in the lab... @abraxas3d
2K Followers 3K Following de W5NYV. Open Research Institute CEO, ARRL TA, ARRL TS, telecom executive, IEEE ITSoc SD Chapter Chair, & Maker of AI Pipe Organs. FCC TAC 🏳️🌈
Nathan West @nathanewest
436 Followers 221 Following DSP and ML for radio frequency astronomy and communications
cje @caseyjohnellis
29K Followers 4K Following troublemaker & troubleshooter | founder @bugcrowd @disclose_io, board advisor, investor | pioneer of #bugbounty as-a-service | opinions CC0 1.0 | #hacktheplanet
Great Scott Gadgets @GSGlabs
10K Followers 92 Following Makers of HackRF One, Cynthion, YARD Stick One, and more. We design open source tools for innovative people.
Louis on AI @louisAI___
0 Followers 328 Following Mutating into an Al Integrator - Forever a creature shaped by Design.
Dmytro Chornyi @Dmytro_Chorny
1 Followers 53 Following
云创兽Ai @Uxalalba492
2 Followers 88 Following 📈 focusing on dividend stocks lover, finance star! looking for hot tips. DM me about AI stocks! 📊 #Buffett #Investing
Yasser Taouir @yasser_taouir
2 Followers 34 Following
JuneStephens @637YibckTrwwbQ
332 Followers 751 Following
Saber Darabi @SADarabi
301 Followers 7K Following
Nirqau @Nirqau58711
2 Followers 103 Following
Hedgie @bringafruitbowl
357 Followers 1K Following
Dr. PickleBryne @PickleBryne
57 Followers 111 Following if it looks stupid but it works... it's probably full of 0-days
Frank Kim @fykim
1K Followers 71 Following
Danielle @flatsubstats
0 Followers 36 Following Hobbyist machine learning engineer building models that think about thinking.
Gustavs Zilgalvis @GZilgalvis
1K Followers 1K Following building @fiftyyears // prev. @stanford @lux_capital @googledeepmind
Ooxeesea @Ooxeesea78224
19 Followers 1K Following
howlfan @howlbigfan
2 Followers 46 Following
Dominique Rice @rice_domin48801
1 Followers 29 Following
Larry @TrojanEnigma21
548 Followers 1K Following Love data, researching economic trends and documenting my journey. No financial/trade advice, just documenting my thoughts. Bull at heart, Bear out of necessity
Jian Huang @jian_platformx
28 Followers 179 Following Associate Professor @ UIUC, Systems Builder, Computer Architect
AlphaBriefing @TheAlphaBrief
507 Followers 1K Following AlphaBriefing⚡ 🇺🇸 Weekly intel drops for investors. Free & Premium access. Subscribe now. We Brief — You Execute. 🧠 Intel ⚠️ Not financial advice.
Tim Becker @tjbecker_
2K Followers 349 Following Security Researcher at @theori_io. Flag capturer at @PlaidCTF. Cryptography enjoyer.
Shift @Shiftreduce
2K Followers 1K Following
lio10 @AbusabhaOmar
9 Followers 238 Following
Nolan | Exvul @ma1fan
4K Followers 2K Following Founder of @exvulsec, All Stars @immunefi. Security Researcher, OrangeHats(@stacks), Ex @huawei
Hassan Raza @hassanraza__07
18 Followers 420 Following
Connor McKoy @TheReaIMcKoy
371 Followers 1K Following Strategic Communications, former comms @iambiotech; University of South Florida alum; Duuuval native
Wil Gibbs @cl4sm
523 Followers 241 Following @ASU Sefcom PhD Student | @Shellphish Captain Emeritus | AIxCC Shellphish Team Lead | pwn and rev is where it’s at | 日本語🤏
Rip&Tear @Cyb3rCh1ck3n
246 Followers 681 Following Cyber Security Lead @crewAIInc - Securing all the Agents Email: [email protected] https://t.co/R8H2yy2UiJ https://t.co/eC2Z6hCUph
Bill Olney @BillOlney2
916 Followers 2K Following I'm just a simple guy with a big heart. I enjoy swimming, I love to work out a lot, love R&B and hip-hop music. I’m into friendships and dates. Be act🌈
untiltetw @untiltetw
0 Followers 287 Following
Team Atlanta @TeamAtlanta24
675 Followers 26 Following 🔥AIxCC Winner Team | Georgia Tech, Samsung Research, KAIST, POSTECH | 🚀Building next-gen AI-driven bug finding & fixing systems | CRS Atlantis 🌊
Yeongjin Jang (blue90... @blue9057
2K Followers 3K Following Principal Engineer at #SamsungResearchAmerica. Member of #TeamAtlanta. DEF CON CTF Winner. My tweets do not reflect the view of Samsung/SRA. A sponsor of 🐻
Ethical Hacker @offethhacker
2K Followers 5K Following
Frank Matthew @frankmatthewIT
80 Followers 1K Following
Trevor Dhu @trevordhu
340 Followers 2K Following Asia Lead, Sustainability Science @Microsoft. Passionate about sustainable development and the Brisbane Lions. Views, retweets and likes are my own.
guido zarrella @gzco
341 Followers 372 Following research director, decision science @ https://t.co/vjASenUsiO ➕ director @ Institute of Neuromorphic Engineering 🏔
Zecel Manatad @zecelmanatad
48 Followers 592 Following Software Engineer | Tech Enthusiast | AI Enthusiast
Pieter Ibelings @ibelings
16K Followers 10K Following Physicist, Engineer, N4IP, Antennas, Space Systems, SDR, RF, RADAR , Phased Arrays, Satellites, PCB Design 🇺🇸🇪🇸🛰️
SwiftOnSecurity @SwiftOnSecurity
405K Followers 9K Following computer security person. former helpdesk.
Daniel Estévez @ea4gpz
10K Followers 401 Following Everything space & RF. Amateur radio operator (EA4GPZ / M0HXM). PhD in Mathematics from @Matematicas_UAM. he/him
hackaday @hackaday
267K Followers 2K Following 🔥 Read: https://t.co/KG4TpCzO7H ☠️ Contribute: tips at hackaday dot com 👉 Projects: @hackadayio #Fediverse: @[email protected] 📒 Learn: https://t.co/p1jaCktSDt
Travis Goodspeed @travisgoodspeed
26K Followers 4K Following Merchant of Dead Trees and Licensed Proselytizer of the Gospel of the Weird Machines with Pwnage, PoC, and Secular Rock.
IanJohnBuckley @IanJohnBuckley
1K Followers 733 Following ASIC/FPGA design, dumpster fires, open source, SDR+HDR, Spaaaaace, cybersecurity, and other mad stuff.
Andrej Karpathy @karpathy
1.4M Followers 1K Following Building @EurekaLabsAI. Previously Director of AI @ Tesla, founding team @ OpenAI, CS231n/PhD @ Stanford. I like to train large deep neural nets.
Cybergibbons 🚲🚲... @cybergibbons
48K Followers 3K Following Andrew Tierney. Head of hardware. IoT hacker. Proud resident of Hounslow. Full on Alpha Male.
Matthew Green is on B... @matthew_d_green
150K Followers 1K Following I teach cryptography at Johns Hopkins. Mostly on BlueSky these days at https://t.co/GI4QlxZr2S.
Bastian Bloessl @bastibl
2K Followers 562 Following Research Group Leader @ Secure Mobile Networking Lab, TU Darmstadt; General Assembly @ GNU Radio; Maintainer @ FutureSDR
rtl-sdr.com @rtlsdrblog
33K Followers 496 Following News and tutorials related to the ultra cheap RTL-SDR software defined radio, and SDR in general. #rtlsdr #rtl2832 #sdr
Luigi Cruz @luigifcruz
4K Followers 956 Following Computer Engineer. Radio Amateur (PU2SPY). I talk about SDR, Raspberry Pi, Machine Learning, Parallel Computing, Satellites, Python, C++, and Golang.
LaForge - @LaF0rge@ch... @LaF0rge
6K Followers 1K Following #Osmocom founder. Mobile Communications expert, former netfilter/iptables hacker, freedom fighter. Nerd. Mensch mit Kommandozeilenhintergrund. #retronetworking
𝙐𝙎𝘼 𝙎𝙖... @usa_satcom
13K Followers 441 Following Satellite Communications. GOES (HRIT/GRB/SUVI), HRPT, Inmarsat, L/S/X/Ku-Band, DSN, Astronomy, Whiskey, Endurance Running, Adventure Racing, Climbing.
Halvar Flake @halvarflake
44K Followers 3K Following Choose disfavour where obedience does not bring honour. I do math. And was once asked by R. Morris Sr. : "For whom?" @[email protected]
Andre @AndrePuschmann
1K Followers 429 Following srsRAN maintainer, father^2, photographer, music lover, coffee addict.
Richard Johnson @richinseattle
18K Followers 3K Following Computer Security, Reverse Engineering, and Fuzzing; Training & Publications @ https://t.co/mloVP6rPB7; hacking the planet since 1995; Undercurrents BOFH
GNU Radio Project @gnuradio
12K Followers 11 Following Official account of the GNU Radio Project, a free & open source toolkit for software radio used by scientists, engineers, and hobbyists. @[email protected]
devnulling @devnulling
1K Followers 903 Following
Donny McCaslin @DonnyMcCaslin
10K Followers 1K Following Lullaby for the Lost | Out September 26 on @editionrecords
Kevin Weil 🇺🇸 @kevinweil
110K Followers 3K Following CPO @OpenAI, BoD @Cisco @nature_org, LTC @USArmyReserve Prev: President @Planet, Head of Product @Instagram @Twitter ❤️ @elizabeth ultramarathons kids cats math
Bob McGrew @bobmcgrewai
27K Followers 1K Following Learning new things. Former Chief Research Officer at OpenAI, early exec at Palantir, early employee at Paypal.
Alex Burkardt @alexburkardt
479 Followers 807 Following Founder and MD at Lowercase B. The future is already here, it's just not evenly distributed.
Michael Kratsios @MichaelKratsios
9K Followers 0 Following Personal account | Assistant to the President & 13th Director of @WHOSTP47 | Previously 4th CTO of the US, Under Secretary of Defense, Thiel Capital, @scale_AI
julia villagra @juliacvillagra
732 Followers 281 Following Chief People Officer, OpenAI // Founder, Tertulia Chamber Music
Bletchley Park @bletchleypark
56K Followers 3K Following Once the top-secret Home of the Codebreakers. 📅 Open daily. ⬇️ Book tickets online!
OpenAI Newsroom @OpenAINewsroom
109K Followers 3 Following The official newsroom for @OpenAI. Tweets are on the record. If you like this account, you’ll love our blog: https://t.co/nEYf8Iq3C0
Defense Charts @DefenseCharts
40K Followers 1 Following 📈🤷♂️📊 dedicated to the presentational aesthetics of the defense-industrial complex // editor: @timhwang
DistrictCon @DistrictCon
986 Followers 26 Following A new DC hacker conference: Bringing together builders, breakers, and fixers to do cool shit. 🪩 Year 1: January 24-25, 2026 🪩 https://t.co/qYKu4hl0Uj
Matt Targett @MatthewTargett
5K Followers 1K Following 🇦🇺 Swammer. Olympic Medalist, World Champion. engagement ≠ endorsement
Omkhar Arasaratnam @_omkhar
329 Followers 137 Following https://t.co/PsBN05Eqsb || https://t.co/aJ4RwewfJB || https://t.co/U2xuM1N95Z || https://t.co/npQi7LLTn1 || https://t.co/JUIQS205kQ
Eureka Labs @EurekaLabsAI
73K Followers 1 Following We are building a new kind of school that is AI native.
SSI Inc. @ssi
102K Followers 0 Following A straight shot to safe superintelligence. Join us https://t.co/hHla3vusDE.
Ben Nimmo @benimmo
27K Followers 995 Following Writer, linguist, diver. Principal Investigator, Intelligence & Investigations @OpenAI. RT ≠ endorsement.
Jason D. Clinton 🔸 @JasonDClinton
2K Followers 232 Following CISO at Anthropic. Ex-Google Chrome. My views are not those of my employer.
Perri Adams @perribus
7K Followers 993 Following @Dartmouth ISTS Fellow & @SAISHopkins Adjunct Prof., inter alia. Former @DARPA, @DEFCON CTF, etc. @DistrictCon, @hexacon_fr, @LABScon_io is CFP Review Boards
Sandro Gianella @sGianella
5K Followers 5K Following Head of Europe Policy and Partnerships for OpenAI Previously Stripe, Google
Vinod Khosla @vkhosla
690K Followers 600 Following entrepreneurship zealot, grounded technology possibilist, believer in the power of ideas, passionate about sustainability & impact
Lawrence H. Summers @LHSummers
374K Followers 711 Following Charles W. Eliot University Professor and President Emeritus at Harvard. Secretary of the Treasury for President Clinton and Director of NEC for President Obama
Stephane Wrembel @StephaneWrembel
989 Followers 211 Following The Official Twitter Account of Guitar Virtuoso Stephane Wrembel.
Jordan Schneider @jordanschnyc
52K Followers 4K Following Newsletter: https://t.co/j23uuLxE59 join 50k readers Podcast: https://t.co/4sx8iev5Az Fellow: @cnasdc
Chris Krebs @C_C_Krebs
233K Followers 3K Following
Becky Waite @_rpwaite
269 Followers 450 Following Head of StratOps @openai | Formerly @meta @citymapper
Jeff Dean @JeffDean
365K Followers 6K Following Chief Scientist, Google DeepMind & Google Research. Gemini Lead. Opinions stated here are my own, not those of Google. TensorFlow, MapReduce, Bigtable, ...
Jonathan Lachman @jonlachman
4K Followers 739 Following founding head of operations at thinking machines @thinkymachines. former head of special projects @openai, obama @whitehouse national security budget director
Karthik Rangarajan @krangarajan
1K Followers 705 Following Engineering things securely @openai. Fomerly Security @robinhoodapp and @addepar. I tweet about startups, security and dogs. Tweets/opinions are my dog's.
OpenAI @OpenAI
4.3M Followers 3 Following OpenAI’s mission is to ensure that artificial general intelligence benefits all of humanity. We’re hiring: https://t.co/dJGr6Lg202
Allie K. Miller @alliekmiller
73K Followers 2K Following #1 Most Followed Voice in AI Business (2M followers). Former Amazon, IBM. Time100 AI. Fortune 500 and startup AI advisor, public speaker. AI-First courses in 🔗
Simon Willison @simonw
115K Followers 6K Following Creator @datasetteproj, co-creator Django. PSF board. Hangs out with @natbat. He/Him. Mastodon: https://t.co/t0MrmnJW0K Bsky: https://t.co/OnWIyhX4CH
Ian Carroll @iangcarroll
16K Followers 1K Following Founder at @SeatsAero. Travel/points, application security, security research, etc. https://t.co/q0VuCP7rXz
Heather Adkins - Ꜻ ... @argvee
14K Followers 1K Following VP Security @Google, Co-Author "Building Secure and Reliable Systems" @r00t0wns, Medieval Historian
CISA Cyber @CISACyber
284K Followers 71 Following Part of @CISAgov, we respond to major incidents, analyze threats, and exchange critical cybersecurity information with partners around the world.