Tom Goldstein ✓

@tomgoldsteincs · joined 19 Jan 2019

Professor at UMD. AI security & privacy, algorithmic bias, foundations of ML. Follow me for commentary on state-of-the-art AI.

27 741Followers

2 210Following

1 824Posts total

255.9KViews on collected posts

Growth & engagement

How the posts we collected actually performed: views and reaction rate post by post, what the audience did with them, and where the follower count goes.

Views per post

4.1K6 Mar

8.5K

3.2K

3.5K

3.7K

4.4K

1.1K7 Mar

3.8K14 Apr

13.9K8 Sep

6.5K

5.7K11 Nov

53.9K17 Feb

Last 14 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.

Engagement rate per post

0.36%6 Mar

0.33%

0.18%

0.41%

0.49%

0.48%

0.46%

0.63%

0.75%7 Mar

1.79%14 Apr

0.47%8 Sep

0.72%

0.61%11 Nov

1.10%17 Feb

Reactions — likes, reposts, replies and quotes — divided by views.

What the audience does

Likes60.2%1 147 in total

Reposts9.3%177 in total

Replies2.6%50 in total

Quotes1.4%27 in total

Bookmarks26.4%503 in total

Share of every reaction we collected for this account. Replies mean argument, reposts mean endorsement, bookmarks mean the post was worth keeping.

The follower curve appears once this account has two daily snapshots — we take one a day, and this one is on its first.

Latest posts

⛷️Here’s my entry for the fast generative model olympics🥇 The Sphere Encoder is an autocoder so powerful that it produces high quality images quickly and without diffusion. At training time, we learn an encoder that maps natural images uniformly onto the surface of a sphere. htt 53.9K views · 504 likes · 61 reposts · 18 replies 17 Feb 2026 · Open on X →

Llama models can increase their performance on reasoning benchmarks if we fine-tune them to "think" longer with recurrence 👇 5.7K views · 29 likes · 5 reposts · 1 replies 11 Nov 2025 · Open on X →

Our new guardian model lets you create LLM guardrails using natural text. This little 8B model efficiently checks in real time whether chatbots comply with bespoke moderation policies. It's not often that academics beats industry models, but DynaGuard stacks up well! https://t.c 6.5K views · 37 likes · 8 reposts · 2 replies 08 Sep 2025 · Open on X →

Guardrails with custom polices are hard for models trained on safety and harm-related datasets. But what if you trained a guardian model on arbitrary rules? Introducing DynaGuard, a guardian model for custom policies: https://t.co/oPWOZstRUQ https://t.co/9E7AN8Uw12 13.9K views · 43 likes · 18 reposts · 1 replies 08 Sep 2025 · Open on X →

Great article by @anilananth on latent reasoning systems coming out of @AIatMeta, @umdcs , and @ELLISInst_Tue. https://t.co/jWAAiJu1gZ 3.8K views · 50 likes · 12 reposts · 4 replies 14 Apr 2025 · Open on X →

@tomgoldsteincs I AM with the creators here, u want to train, then use your on database without copyrighted material 1.1K views · 8 likes · 0 reposts · 0 replies 07 Mar 2023 · Open on X →

Our paper describes methods for matching diffusion images to source images in the training set. I'll leave you with some examples what we found: https://t.co/zCVI2J6K9n 4.4K views · 21 likes · 3 reposts · 4 replies 06 Mar 2023 · Open on X →

Getty’s lawsuit could produce even wider reverberations, as it focuses on whether web data can be used for training without considering the specific license terms of each item. The decision may impact commercial datasets for diffusion, LLMs, and many other AI products. 3.7K views · 12 likes · 3 reposts · 1 replies 06 Mar 2023 · Open on X →

If you want to read more, check out our recently accepted CVPR paper https://t.co/0dwmtmy0TJ 4K views · 17 likes · 1 reposts · 1 replies 06 Mar 2023 · Open on X →

However you define copying vs non-copying, the model will make images that are epsilon-close to either side of the boundary. Diffusions create millions of images per day, and the courts will need to define what (if any) scalable practices are acceptable. https://t.co/UUtsULqsWi 3.5K views · 15 likes · 1 reposts · 1 replies 06 Mar 2023 · Open on X →

The court’s decisions on these cases could have massive impacts on the AI community at large, and it’s not clear what sort of rulings to expect. The first suit is a legal quagmire because diffusion can make pixel-wise, semantic, and style copies... 3.2K views · 12 likes · 0 reposts · 1 replies 06 Mar 2023 · Open on X →

Interestingly, we have found examples of diffusion-generated images that Getty claims to have copyright over. However they are often widely used images that may be public domain, and for which Getty’s licensing claims are likely to be invalid. https://t.co/P0LgUsYRr5 8.5K views · 13 likes · 0 reposts · 1 replies 06 Mar 2023 · Open on X →

The Getty lawsuit is more reserved. It avoids claims that SD copies images and instead claims that training on Getty data is illegal because it requires removal and modification of copyright claims and licenses. As evidence, they show SD has learned the Getty watermark. https:/ 4K views · 11 likes · 1 reposts · 1 replies 06 Mar 2023 · Open on X →

They also claim diffusion images are necessarily “derivative works” because the model was trained on existing art (an argument that holds just as well for humans 🤔). They further claim Deviant Art’s partnership with SD is negligent because it's not in the interest of artists. htt 4.1K views · 13 likes · 1 reposts · 1 replies 06 Mar 2023 · Open on X →

These copies seem to occur <2% of the time. They copy from creative assets and stock photos that are repeated across the internet. While these may be copyrighted, they are created by graphic designers and not the plaintiffs. You can retrieve one with the prompt “Wall view 002” 4K views · 14 likes · 1 reposts · 1 replies 06 Mar 2023 · Open on X →

There are two major US lawsuits against SD. First, there’s a class action on behalf of artists. The claims focus on the idea that diffusion models store “compressed” copies of images, and that diffusion models are modern “collage tools.” https://t.co/ZhWrD3QDCP 5.4K views · 13 likes · 1 reposts · 1 replies 06 Mar 2023 · Open on X →

While the complaint provides no hard evidence, SD can indeed make collage content in some situations. In this case, we ask for an image of an iPhone case, and the model copies an image from the training set, swapping in a picture of a different phone. https://t.co/cpxz40wMRH 10.3K views · 15 likes · 1 reposts · 1 replies 06 Mar 2023 · Open on X →

#StableDiffusion is being sued for copyright infringement. Our recent #CVPR2023 paper revealed that diffusion models can indeed copy from training images in unexpected situations. Let’s see what the lawsuit claims are, and if they're true or false 🧵 https://t.co/0dwmtmy0TJ https 115.8K views · 320 likes · 60 reposts · 10 replies 06 Mar 2023 · Open on X →

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