Bill Yuchen Lin (@billyuchenlin) / X

Bill Yuchen Lin

2,374 posts

Bill Yuchen Lin

@billyuchenlin

RL for coding @xAI @SpaceX Affiliate Assistant Prof @UW. Ex: @allen_ai; Google, Meta FAIR.

Palo Alto, CA

Joined April 2016

Pinned
Bill Yuchen Lin
@billyuchenlin
Jun 4
The updated Grok-build model (still the 0.5T one) is much better than before. It’s less lazy, more autonomous, and more accurate. We are still improving it on long-horizon tasks. Stay tuned and enjoy it in our beautiful TUI with new usage limits! 🚀
skcd
@skcd42
Jun 4
we are resetting rate limits so you all can try out Grok Build more! we now ship with a new checkpoint of Grok Build and Composer 2.5 as always looking for critical feedback to improve
5.6M
Bill Yuchen Lin
@billyuchenlin
Dec 14, 2024
"We've been quietly testing a new version of Grok-2 -- 3X faster and offers improved accuracy, instruction-following, and multi-lingual capabilities. We are rolling out this new version to all users on 𝕏 for FREE!" 🎁 Btw, thrilled to share I've joined @xai a few weeks ago,
xAI
@xai
Dec 14, 2024
x.ai/blog/grok-1212
3.4M
Bill Yuchen Lin
@billyuchenlin
Sep 29, 2025
The team has been grinding tirelessly on exciting projects over the past few weeks. Stay tuned for Grok Code!
Elon Musk
@elonmusk
Sep 28, 2025
Grok Code now being used more than all other AIs combined on OpenRouter
2.8M
Bill Yuchen Lin
@billyuchenlin
Jun 27, 2025
Coding to improve Grok’s coding is pure joy, like art for art’s sake! Vibe coding with the team in the war room is 🔥. Please share your real-world coding problems (e.g., those you may ask in Cursor’s Agent mode) for Grok to crush.
Elon Musk
@elonmusk
Jun 27, 2025
Grinding on @Grok all night with the @xAI team. Good progress. Will be called Grok 4. Release just after July 4th. Needs one more big run for a specialized coding model.
2.1M
Bill Yuchen Lin
@billyuchenlin
Feb 18, 2025
Been at @xAI for 3 months, and today’s the most exciting day yet. The Grok 3 demo tonight’s got the office thrilled, everyone’s honing it. Stoked to be on the smartest team. Get ready for something huge! 😎
323K
Bill Yuchen Lin
@billyuchenlin
Feb 24, 2025
"Is 112345679 a prime number?" My friend asked me to test this on Grok 3 reasoning this morning. Unsurprisingly, Grok nailed it with sharp reasoning -- not a prime number as it’s 89 × 1262311! Btw, neither o1 nor o3-mini-high can answer it correctly. 🔗 Links below - Grok-3
1.3M
Bill Yuchen Lin
@billyuchenlin
Sep 5, 2025
More exciting updates coming soon! 🚀
X Freeze
@XFreeze
Sep 5, 2025
Grok Code holds #1 spot by a huge margin – most used model on OpenRouter this month
1.6M
Bill Yuchen Lin
@billyuchenlin
Jul 10, 2025
GROK4⃣ 🚀🚀🚀🚀
209K
Bill Yuchen Lin
@billyuchenlin
Feb 19, 2025
The internal version of Grok 3 is getting improved with every Planck time tick, thanks to all feedback on 𝕏! 🚀
Elon Musk
@elonmusk
Feb 19, 2025
Grok will improve almost every day
641K
Bill Yuchen Lin
@billyuchenlin
Jan 25, 2021
We often cite papers using arXiv info w/o noting that they are already PUBLISHED in confs like @aclmeeting and @iclr_conf. These incorrect bib entries are so annoying!😠 We introduce Rebiber, a tool to fix them using @aclanthology and @dblp_org. 😆 Code: github.com/yuchenlin/rebi…
Bill Yuchen Lin
@billyuchenlin
Feb 18, 2025
Grok-3-Mini is awesome and will be free!
Juntang Zhuang
@archanfel_anoth
Feb 18, 2025
Excited to be a member of the amazing team at @xai , and shipping the best grok3! Thrilled to lead grok3-mini training, and will ship it to all users for free in the coming days! LFG!
61K
Bill Yuchen Lin
@billyuchenlin
Oct 18, 2025
clear and achievable goal for AGI and Grok 5! 🚀 LFG
Elon Musk
@elonmusk
Oct 18, 2025
Replying to @kimmonismus
Capable of doing anything a human with a computer can do, but not smarter than all humans and computers combined. That’s probably three to five years away. Grok 5 will be better at AI engineering (called “research” by the pompous) than @karpathy, for example.
157K
Bill Yuchen Lin
@billyuchenlin
Aug 28, 2025
We are thrilled to announce the release of our 1st model for coding and agentic tasks, grok-code-fast! You can now integrate it into all IDE and CLI tools for your daily coding needs. It’s fast, powerful, and affordable! We’re committed to continuous improvement based on your
xAI
@xai
Aug 28, 2025
Introducing Grok Code Fast 1, a speedy and economical reasoning model that excels at agentic coding. Now available for free on GitHub Copilot, Cursor, Cline, Kilo Code, Roo Code, opencode, and Windsurf. x.ai/news/grok-code…
118K
Bill Yuchen Lin
@billyuchenlin
Apr 18, 2021
Introducing the beta version of 𝙵𝚎𝚍𝙽𝙻𝙿, an open-source research platform for federated learning in NLP. Thanks to the awesome @huggingface and FedML, we integrate Transformer models and many popular FL methods (FedAvg, FedOpt, etc.). 🥳 Code: github.com/FedML-AI/FedNLP [1/4]