Viraj Mehta @thebigmehtaphor
cofounder and cto @tensorzero. previously did a PhD at CMU doing sample efficient reinforcement learning for tokamaks and math and cs @stanford before that virajm.com Joined February 2012-
Tweets182
-
Followers645
-
Following492
-
Likes4K
how do inference services ever output control tokens? can't you unit test for this? shouldn't you have monitoring set up for this? I don't want to name names but sheeeeesh
the responses API is a way for @OpenAI to lock people in. It’s trivially true that any stateful interface can become stateless if you are allowed to return an encrypted blob of data (like Anthropic does today). Gating new features behind something like this is a wedge
10000 and 100 on the same day is nice & round it is great to see the project grow up big & strong!
Al Chen (@bigal123) from Grammarly recently built an agent with a continuous improvement loop using TensorZero + LangGraph. Watch his presentation at the NYC LangChain Meetup last week!
We need to make good decisions about an applications’s LLM stack the same way we make good decisions about parameters of other high-throughput systems. Alan’s work will bring automation and rigor to the process for TensorZero users. Couldn’t be more excited to work with him.
We need to make good decisions about an applications’s LLM stack the same way we make good decisions about parameters of other high-throughput systems. Alan’s work will bring automation and rigor to the process for TensorZero users. Couldn’t be more excited to work with him.
🫡🤘🏾🚀
WANTED: Founding MTS with a background that combines product and engineering We can't keep up with TensorZero's open-source traction. You can help. Join our founding team in a cross-functional role that combines product, engineering, and GTM. Team: 3 ML researchers (Stanford,…
This release to me highlights the power of @rustlang and the PyO3 / NAPI-RS interfaces on top. It’s so nice to have a portable and canonical codebase to maintain consistency. The experimental features speak to the crazy stuff we’ll be building later this year. 🤔
This release to me highlights the power of @rustlang and the PyO3 / NAPI-RS interfaces on top. It’s so nice to have a portable and canonical codebase to maintain consistency. The experimental features speak to the crazy stuff we’ll be building later this year. 🤔
It’s been a blast collaborating with Andrew over the past couple months and we couldn’t be more excited to have him on board. We’re excited for our developer community to benefit from the stuff he’s cooking!
It’s been a blast collaborating with Andrew over the past couple months and we couldn’t be more excited to have him on board. We’re excited for our developer community to benefit from the stuff he’s cooking!
I switched from a decade of vim to @cursor_ai. Now we can peek at how it works 🕵️. check out how we got under the hood of this bad boy
I switched from a decade of vim to @cursor_ai. Now we can peek at how it works 🕵️. check out how we got under the hood of this bad boy
really excited for Dynamic Evaluations - a key milestone for some of the crazy RL features we have planned
really excited for Dynamic Evaluations - a key milestone for some of the crazy RL features we have planned
Sanity check on AI coding agent progress: how many AI-generated PRs are OSS repositories accepting?

Sam Power @sp_monte_carlo
19K Followers 7K Following Lecturer in Maths & Stats at Bristol. Interested in probabilistic + numerical computation, statistical modelling + inference. @OnlineMCSeminar. (he / him)
Zachary Lipton @zacharylipton
63K Followers 2K Following Cofounder & CTO: @AbridgeHQ, Professor: CMU/@acmi_lab, Creator: @d2l_ai & https://t.co/QQt98VNLUp, Relapsing 🎷
Gokul Swamy @g_k_swamy
4K Followers 1K Following last year phd student @CMU_Robotics working on efficient algorithms for interactive learning (e.g. imitation / RL / RLHF). no model is an island. prefers email.
Saurabh Garg @saurabh_garg67
2K Followers 640 Following @thinkymachines | prev/ Researcher @MistralAI; PhD @mldcmu; CS @iitbombay (undergrad); Collab @GoogleAI @awscloud @apple
Nicholas Roberts @nick11roberts
1K Followers 2K Following Ph.D. student @WisconsinCS. Working on foundation models and breaking past scaling laws. Previously CMU @mldcmu, UCSD @ucsd_cse, FCC @fresnocity. 🤔🤨🧐 e/hmm
Stephanie Milani @steph_milani
4K Followers 323 Following Incoming Faculty Fellow @NYU_Courant, then Assistant Professor @JHUCompSci. Human-centered reinforcement learning & AI agents
Eacavouq @Eacavouq2646
16 Followers 317 Following Confidence is not “they will like me.” Confidence is “I’ll be fine if they don’t.”
Gihorw @Gihorw10020
78 Followers 3K Following
shuyang @_shuyang_
30 Followers 236 Following tech, fashion, art, taste. opinions my own. tell me something anonymously: https://t.co/denM5KUX2D
Saurabh karale @saurabhkarale27
39 Followers 349 Following Training LLMs by day, overanalyzing memes by night. 0s, 1s, and way too many side projects. Mastery isn’t linear. It’s multidimensional…! 🤓👽
Duy Nguyen @duynwin
128 Followers 1K Following AI/ML Engineer | PhD in statistics, Alum @UWMadison | concert pianist
Nitish @Niitiish7
331 Followers 502 Following Building products with AI and ML and Web development Full stack
Camellia @6VEtqZ5905ik08
14 Followers 665 Following
Nathan Davis @nath_umatr
46 Followers 238 Following Manager @umatr_io 🦀 | Professional chill guy between "we’re hiring" & “nah were good" Contributor @RustMatters 🦀 | Engineers talk, I just nod and bring pizza
Vipul Sarode @SarodeVipul98
0 Followers 84 Following
Rational Types @rationaltypes
0 Followers 36 Following
Unwitty @unwitty
148 Followers 416 Following Worried I might be an LLM: exceptional logical reasoning within immediate context, but constrained working memory and zero long-term retention
JamieWhitman @vJR7TTg5pL8z113
38 Followers 1K Following
Xiaoyan Hu @Yannwith2ns
104 Followers 809 Following Postdoc @AutonLab @CMU_Robotics | PhD @cuhkcse | reinforcement learning (RL) | ☕️ 📷
ChloePepys @fhTSP6bT9mTq5
31 Followers 1K Following
Mor Zusman @MorZusman
29 Followers 646 Following
Sophie @RSx9U2Fay28EaX
30 Followers 825 Following
Ollie Liu @olliezliu
480 Followers 882 Following Research Intern with FAIR @AIatMeta 👨🍳 Oliver IRL; #ML PhD student @CSatUSC 🎓 Alum @mldcmu @MSFTResearch 🧐 Foundation Models, AI4Science, Decision Making
Trudy kidst @KidstTrudy
217 Followers 2K Following Crypto Trader| Researcher | Educational AI, RWA, DePin Content| Strategic Advisor | $5.5 M revenue
Ciprianii @CiprianiMacovei
499 Followers 7K Following engineer - lifting equipment / bird watcher / future astronaut / Villa from Aston fan
Wendy @64xa6atIO2vsp87
40 Followers 1K Following
Tech with Mak @techNmak
13K Followers 619 Following AI, coding, software, and whatever’s on my mind.
Chip Huyen @chipro
120K Followers 614 Following AI Engineering: https://t.co/94dv4uTU1H Designing ML Sys: https://t.co/G81hL2dWmr Entanglements: https://t.co/W27aXeiySY @aisysbooks
Ajitesh @ajiteshleo
2K Followers 754 Following Building Tough Tongue AI 💜 - Try at https://t.co/hYqmXSqoTc Former Product Manager at Google Cloud, IITD Graduate, Kellogg MBA
Ryan Shmeizer @ryanshmeizer
1K Followers 758 Following Partner at @HOFCapital. These are my views, and if you don't like them... well, I have others.
Cenk Sidar @cenksidar
103K Followers 8K Following Building Enquire AI – not just another expert network. We combine AI + human expertise to deliver conversational insights that are faster and smarter.
Shikha Khanna @khanna_justin
57 Followers 534 Following Remember that! only money can makes more money!!!
Jukka Paulin @jukkapaulin
704 Followers 3K Following Helsinki. Follow me. Oh, if you're watching this, I am still probably alive. Have watched and enjoyed Ready Player One. Scifi fan, medium level.
Hildegard @Heqerl8356
34 Followers 2K Following There is no limit to what we, as women, can accomplish.
Amar Sukhi @SukhiSecurity
168 Followers 7K Following
Dwaipayan Dhawa @dhawadwai
24 Followers 155 Following Founder @cotonai_ • Building Agentic AI for fashion supply chain • Gap Inc • Ex-Myntra • Sketch → Render → Revolution • Raising Fund •
Tobia DeAngelis @tobdea
4K Followers 2K Following Cofo/CEO at EU 1st online school for software engineers (YC-backed). Raised $2M, led it to M&A, then helped raise $10M Series A as President. Building again.
Sudhanshu Heda @HedaSudhanshu
322 Followers 2K Following humble footsoldier on the periphery of the empire
Carlos Mena @gr1ndtoshine
38 Followers 317 Following Independent software developer and lifetime entrepreneur. Currently exploring the potential of AI and LMs.
Tanay Jaipuria @tanayj
70K Followers 3K Following partner @wing_vc investing in AI applications and infra. opinions, analysis, and banter on technology and business
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.
Google DeepMind @GoogleDeepMind
1.2M Followers 279 Following We’re a team of scientists, engineers, ethicists and more, committed to solving intelligence, to advance science and benefit humanity.
Jim Fan @DrJimFan
327K Followers 3K Following NVIDIA Director of Robotics & Distinguished Scientist. Co-Lead of GEAR lab. Solving Physical AGI, one motor at a time. Stanford Ph.D. OpenAI's 1st intern.
Yann LeCun @ylecun
955K Followers 765 Following Professor at NYU. Chief AI Scientist at Meta. Researcher in AI, Machine Learning, Robotics, etc. ACM Turing Award Laureate.
CMU School of Compute... @SCSatCMU
48K Followers 765 Following The School of Computer Science at @carnegiemellon is one of the world's premier institutions for computer science research and education.
Nathan Lambert @natolambert
57K Followers 856 Following Figuring out AI @allen_ai, open models, RLHF, fine-tuning, etc Contact via email. Writes @interconnectsai Wrote The RLHF Book Mountain runner
Zachary Lipton @zacharylipton
63K Followers 2K Following Cofounder & CTO: @AbridgeHQ, Professor: CMU/@acmi_lab, Creator: @d2l_ai & https://t.co/QQt98VNLUp, Relapsing 🎷
Danijar Hafner @danijarh
22K Followers 1K Following Building AI that makes autonomous decisions using world models, artificial curiosity, and temporal abstraction @GoogleDeepMind
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 🦋
Gokul Swamy @g_k_swamy
4K Followers 1K Following last year phd student @CMU_Robotics working on efficient algorithms for interactive learning (e.g. imitation / RL / RLHF). no model is an island. prefers email.
Clément Canonne (on ... @ccanonne_
37K Followers 65 Following Senior Lecturer @Sydney_Uni. Formerly Postdocs @IBMResearch, @Stanford; PhD @Columbia. Converts ☕ into puns: sometimes theorems. He/him. @ccanonne.bsky.social
Saurabh Garg @saurabh_garg67
2K Followers 640 Following @thinkymachines | prev/ Researcher @MistralAI; PhD @mldcmu; CS @iitbombay (undergrad); Collab @GoogleAI @awscloud @apple
Edward Grefenstette �... @egrefen
42K Followers 866 Following FR/US/GB AI/ML Person, Director of Research at @GoogleDeepMind, Honorary Professor at @UCL_DARK, @ELLISforEurope Fellow. All posts are personal.
Jelani Nelson @minilek
27K Followers 266 Following Professor and Department Chair @Berkeley_EECS. Research Scientist (part-time) @GoogleAI. Founder @addiscoder. 🇻🇮🇺🇸🇪🇹
Pablo Samuel Castro @pcastr
13K Followers 830 Following Señor swesearcher @ Google DeepMind. Adjunct prof @ U de Montreal & Mila. Musician. From 🇪🇨 living in 🇨🇦.
Animesh Garg @CORL202... @animesh_garg
29K Followers 1K Following Foundation Models for Generalizable Autonomy in Robotics. Reinforcement Learning. Assistant Professor in AI Robotics @GeorgiaTech. Prev @nvidia
Jascha Sohl-Dickstein @jaschasd
25K Followers 717 Following Member of the technical staff @ Anthropic. Most (in)famous for inventing diffusion models. AI + physics + neuroscience + dynamics.
shuyang @_shuyang_
30 Followers 236 Following tech, fashion, art, taste. opinions my own. tell me something anonymously: https://t.co/denM5KUX2D
Stavros Halkias @stavvybaby
312K Followers 845 Following New special ‘FAT RASCAL’ only on Netflix! Listen to the @stavvysworld podcast available everywhere
Dwarkesh Patel @dwarkesh_sp
130K Followers 919 Following Host of @dwarkeshpodcast https://t.co/3SXlu7fy6N https://t.co/4DPAxODFYi https://t.co/hQfIWdM1Un
Kincaid O'Neil @kincaidoneil
152 Followers 775 Following
Broooooklyn @Brooooook_lyn
6K Followers 1K Following Creator of the https://t.co/iUjhVUIsRc | @voidzerodev
Mitchell Hashimoto @mitchellh
146K Followers 141 Following Working on a new terminal: Ghostty. 👻 Prev: founded @HashiCorp. Created Vagrant, Terraform, Vault, and others. Vision Jet Pilot. 👨✈️
Arjun Narayan @narayanarjun
4K Followers 1K Following Boris Babayan said "architecture, operating system and languages, compiler, it's only one project". Investing in improvements to the project @AmplifyPartners.
Han Guo @HanGuo97
3K Followers 4K Following PhD Student @MIT_CSAIL | Past: @LTIatCMU @MITIBMLab @UNCNLP, @SFResearch, @BaiduResearch | Machine Learning, NLP.
Standard Completions @stdcompletions
284 Followers 12 Following standard, openai-compatible completions api for llms
thebes @voooooogel
15K Followers 900 Following "peaceful, albeit ominous" ꙮ website → https://t.co/aykxqKippW ꙮ games → https://t.co/3Pz19vHOwd ꙮ 💞💍📝 @holotopian ꙮ she/they 🏳️⚧️
shehjad @shjdkhn
759 Followers 702 Following co-founder at stealth. prev: quant/swe @goldmansachs @microsoft @zfellows @uwaterloo
NBACentel @TheNBACentel
713K Followers 3K Following Featured on @ESPN, @BarstoolSports, @SINoW, @FoxSports, @ComplexSports | PARODY Account. NOT Affiliated with @TheDunkCentral
Rivers @riversposting
702 Followers 2K Following For the purposes of this bio, assume I have been in all the right places at all the right times.
Ilija Bogunovic @ilijabogunovic
1K Followers 395 Following Assistant Prof/Lecturer @ UCL. Previously at @ETH, @MIT_CSAIL, @Twitter, and @EPFL
Mihir Patel @mvpatel2000
6K Followers 510 Following Member of Technical Staff @AnthropicAI. prev @MosaicML/@DbrxMosaicAI, @Stanford. Views do not represent my employer.
Damek @damekdavis
6K Followers 1K Following Optimization and ML, Prof @Wharton Stats, Prev: Prof @Cornell, PhD @uclamath, https://t.co/bfOIEx0lHj, (not quite a) blog: https://t.co/RFKUB4qDKF
Siddarth Venkatraman @siddarthv66
577 Followers 460 Following PhD at Mila | RL and other stuff I find interesting
Brandon Cui @BrandoCui
64 Followers 136 Following
kalomaze @kalomaze
19K Followers 2K Following ML researcher (@primeintellect), speculator • extremely silly jester
Dylan Foster 🐢 @canondetortugas
3K Followers 1K Following Foundations of RL/AI @MSFTResearch. Previously @MIT @Cornell_CS https://t.co/vQIdUzsw8B RL Theory Lecture Notes: https://t.co/bhgL3aKIk0
Audrey Huang @auddery
138 Followers 80 Following
DSPy @DSPyOSS
11K Followers 50 Following An open-source declarative framework for building modular AI software. Programming—not prompting—LLMs via higher-level abstractions & optimizers.
Sam Rodriques @SGRodriques
15K Followers 194 Following Director and CEO at FutureHouse. Building an AI scientist. https://t.co/rQYoPOxsYo
Swaminathan Gurumurth... @SwaminathanGur3
713 Followers 3K Following PhD student at the Robotics Institute, CMU
Alexander Doria @Dorialexander
19K Followers 4K Following Reasoning models to come. Co-founder @pleiasfr
Zihan Wang - on RAGEN @wzihanw
23K Followers 612 Following PhD Student @NorthwesternU. Intern @yutori_ai. I study PhysiCS of LLM. Ex @deepseek_ai @uiuc_nlp @RUC. RAGEN | Chain-of-Experts | ESFT.
rahul @rahulgs
4K Followers 1K Following
Wenting Zhao @wzhao_nlp
5K Followers 607 Following reasoning & llms @Alibaba_Qwen Opinions are my own
aj @anndvision
1K Followers 659 Following postdoc @Columbia . member of @blei_lab . phd @UniofOxford . prev @OATML_Oxford , @PVG_McGill , intern @Meta . he / they
Apptronik @Apptronik
19K Followers 737 Following Apptronik develops humanoid robots that work alongside people doing the tasks that humans don't want to do.
Dylan HadfieldMenell @dhadfieldmenell
4K Followers 2K Following Associate Prof @MITEECS working on value (mis)alignment in AI systems; @[email protected]; he/him
Taylor W. Killian @tw_killian
3K Followers 890 Following Senior Research Scientist @MBZUAI @a16z , interested in Decision Making & Generalization // @BYU '13; @Harvard '17; @UofT '24
skcd @skcd42
8K Followers 291 Following Understanding the universe @xai ex hacking @aide_dev ex fb engineer ICPC WF its just code 👨🏼💻
James Chen @jchencxh
882 Followers 513 Following mostly representation learning for vision and generalisation @SCSatCMU hot takes on everything else