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Benjamin Warner

@benjaminwarner.dev
355 followers 164 following 41 posts

Research at sophont.med, previously answer.ai Vaccines save lives.

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Reposted by Benjamin Warner
Ted Underwood @tedunderwood.com · 08/08/2026
initially seems good, but the more you use a tool like this, the more you lose your own ability to forecast cylones
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Benjamin Warner @benjaminwarner.dev · 27/10/2025
Some personal news: I've joined sophont.med to help build the next generation of open medical foundation models. We've relaunched medarc.ai, our open science research community. Join us if you want to help advance open medical AI. And we are hiring.
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mr. TIM @timkellogg.me · 13/09/2025
counterpoint: GPT-5 does this, it says it doesn’t know rather than hallucinate, the world hasn’t fallen apart
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Tom Aarsen @tomaarsen.com · 09/09/2025
ModernBERT goes MULTILINGUAL! One of the most requested models I've seen, @jhuclsp.bsky.social has trained state-of-the-art massively multilingual encoders using the ModernBERT architecture: mmBERT. Stronger than an existing models at their sizes, while also much faster! Details in 🧵
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Benjamin Warner @benjaminwarner.dev · 06/09/2025
ChatGPT has been the best technical search engine since o4-mini. Thinking Mini still makes for a good faster search if you don’t need the extra reasoning ability.
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Benjamin Warner @benjaminwarner.dev · 24/08/2025
Good LLMs do know and/or can reason about these things. Small, cheap, and often free LLMs are the models which cannot. Remember the glue on pizza Reddit post that the subpar Google AI cited uncritically? Bing’s then integration of GPT 3.5 recognized the Reddit post as sarcasm.
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Sung Kim @sungkim.bsky.social · 24/08/2025
Writing Speed-of-Light Flash Attention for 5090 in CUDA C++ by Thien Tran He walkthrough how he learned to implement Flash Attention for 5090 in CUDA C++. The main objective is to learn writing attention in CUDA C++,
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Eugene Vinitsky 🍒 @eugenevinitsky.bsky.social · 21/08/2025
Microsoft made a useful LLM copilot tool that could summarize text in spreadsheets. They provided clear instructions about how to use it and not to use it. In response, journalists are now mocking them for doing exactly the right thing and showing how to use and not use the tools.
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Benjamin Warner @benjaminwarner.dev · 18/07/2025
Reports of AI eating entry level jobs are greatly exaggerated. My guess is current and near-future LLMs are more likely to increase the demand for programmers, not decrease demand (Jevons Paradox).
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Benjamin Warner @benjaminwarner.dev · 10/02/2025
One of the questions we debated while training ModernBERT was whether a modern trained encoder would unlock zero-shot reasoning using only it's generative head? Spoilers: the answer is yes.
from transformers import pipeline

model_name = "answerdotai/ModernBERT-Large-Instruct"
fill_mask = pipeline("fill-mask", model=model_name, tokenizer=model_name)

text = """You will be given a question and options. Select the right answer.
QUESTION: If (G, .) is a group such that (ab)^-1 = a^-1b^-1, for all a, b in G, then G is a/an
CHOICES:
- A: commutative semi group
- B: abelian group
- C: non-abelian group
- D: None of these
ANSWER: [unused0] [MASK]"""

results = fill_mask(text)
answer = results[0]["token_str"].strip()
print(f"Predicted answer: {answer}")  # Answer: B
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Simon Willison @simonwillison.net · 05/02/2025
o3-mini is really good at writing internal documentation - feed it a codebase, get back a detailed explanation of how specific aspects of it work simonwillison.net/2025/Feb/5/o...
simonwillison.net
o3-mini is really good at writing internal documentation
I wanted to refresh my knowledge of how the Datasette permissions system works today. I already have [extensive hand-written documentation](https://docs.datasette.io/en/latest/authentication.html) for...
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Maria Antoniak @mariaa.bsky.social · 27/01/2025
If you want to quickly catch up on all the open modeling things (DeepSeek, ModernBERT, etc.), this was a great overview, by @natolambert.bsky.social. I somehow got into an argument last week with someone who was insisting that all models are industrial blackboxes... and I wish I'd had this on hand.
interconnects.ai
The latest open artifacts (#6): Reasoning models, China's lead in open-source, and a growing multimodal space
Artifacts log 6 The open LM ecosystem yet again accelerates.
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Benjamin Warner @benjaminwarner.dev · 23/01/2025
In addition to being the best retrieval model under 300M params on METB (without extra work), and top 10 for under 1B, here's a fun tidbit from Alibaba's GTE ModernBERT model card: gte-modernbert-base beats gte-qwen1.5-7b on LoCo long context retrieval with 7B less parameters.
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Tom Aarsen @tomaarsen.com · 14/01/2025
The newest extremely strong embedding model based on ModernBERT-base is out: `cde-small-v2`. Both faster and stronger than its predecessor, this one tops the MTEB leaderboard for its tiny size! Details in 🧵
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Antoine Chaffin @nohtow.bsky.social · 14/01/2025
ModernBERT-embed-base is awesome because it allows to use ModernBERT-base for various tasks out-of-the-box But the large variant of ModernBERT is also awesome... So today, @lightonai.bsky.social is releasing ModernBERT-embed-large, the larger and more capable iteration of ModernBERT-embed!
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Benjamin Warner @benjaminwarner.dev · 10/01/2025
ModernBERT is officially released on Transformers v4.48.0. You no longer need to install from git to use. If you are plugging ModernBERT into an existing encoder finetuning pipeline, try increasing the learning rate. We've found that ModernBERT tends to prefer a higher LR than older models.
Transformers v4.48.0: ModernBERT, Aria, TimmWrapper, ColPali, Falcon3, Bamba, VitPose, DinoV2 w/ Registers, Emu3, Cohere v2, TextNet, DiffLlama, PixtralLarge, Moonshine
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Benjamin Warner @benjaminwarner.dev · 07/01/2025
The good: 32GB The bad: $2,000 The Ugly*: PCIe 5 without NVLink
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John West @johnwest.bsky.social · 01/01/2025
Via @simonwillison.net's excellent blog, I found this great quote about AI models, from @benjaminwarner.dev et al. www.answer.ai/posts/2024-1... It seems to me that AI will be most relevant in people's lives because the Honda Civic is ubiquitous, not so much because everyone is driving a Ferrari.
Basically, a frontier model like OpenAI’s O1 is like a Ferrari SF-23. It’s an obvious triumph of engineering, designed to win races, and that’s why we talk about it. But it takes a special pit crew just to change the tires and you can’t buy one for yourself. In contrast, a BERT model is like a Honda Civic. It’s also an engineering triumph, but more subtly, since it is engineered to be affordable, fuel-efficient, reliable, and extremely useful. And that’s why they’re absolutely everywhere.
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Tom Aarsen @tomaarsen.com · 31/12/2024
That didn't take long! Nomic AI has finetuned the new ModernBERT-base encoder model into a strong embedding model for search, classification, clustering and more! Details in 🧵
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Benjamin Warner @benjaminwarner.dev · 22/12/2024
This week we released ModernBERT, the first encoder to reach SOTA on most common benchmarks across language understanding, retrieval, and code, while running twice as fast as DeBERTaV3 on short context and three times faster than NomicBERT & GTE on long context.
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Mark J. Nelson @mm-jj-nn.bsky.social · 19/12/2024
Great blog post (by a 15-author team!) on their release of ModernBERT, the continuing relevance of encoder-only models, and how they relate to, say, GPT-4/llama. Accessible enough that I might use this as an undergrad reading.
huggingface.co
Finally, a Replacement for BERT: Introducing ModernBERT
We’re on a journey to advance and democratize artificial intelligence through open source and open science.
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Benjamin Warner @benjaminwarner.dev · 13/12/2024
I feel the need for speed.
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