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Alex Rubinsteyn

@alexr.bsky.social
6.1K followers 1.2K following 1.7K posts

personalized cancer immunotherapy = genomics + immunology + machine learning + oncology (pirl.unc.edu)

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Alex Rubinsteyn @alexr.bsky.social · 6h
FYI I wrapped a lot of immuno-informatics predictors so you don't have to: openvax.github.io/mhctools/ (eg NetMHCpan, MHCflurry, Pepsickle, DeepTAP, ERAMER, BigMHC, PRIME, &c)
openvax.github.io
mhctools
Run MHC binding, presentation, immunogenicity and antigen-processing predictors through one predict() call
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Alex Rubinsteyn @alexr.bsky.social · 18h
Acquired Disney episode such a dread-inducing tour of how capitalism always wins when you’re trying to balance it against artistic integrity and societal myth-formation Also feels like the opening round of whatever AI will do to culture, slop is way more efficient than quality
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Alex Rubinsteyn @alexr.bsky.social · 29/09/2026
Roadmap: 2.4: dig into the processing predictor’s sensitivity to negative sampling strategy, modernize network architectures, train on 2x more data 3.0: a few deeper research ideas that might be bigger unlocks I’m short on time, let me know if you want to help
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Alex Rubinsteyn @alexr.bsky.social · 29/09/2026
MHCflurry 2.3 is out Lots of internal improvements to make both training and prediction faster on multi-GPU Also trained a slightly better model (first new weights in a long time) Thanks to NVIDIA for the Brev credits Try it out and tell me what I broke
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Rob Patro @robp.bsky.social · 25/09/2026
Cuttlefish 3.0.3 is out! github.com/COMBINE-lab/... Fun little jaunt with Opus 5.5 to substantially reduce the memory requirement (especially at moderate thread counts). Now it's both non-trivially faster *and* more memory-frugal than the initial C++ implementation!
github.com
Release 3.0.3 · COMBINE-lab/cuttlefish
Release Notes Colored builds use far less memory at low and moderate thread counts. On 149,998 Salmonella assemblies at 16 threads, peak RSS falls from 22.4 GB to 8.9 GB (C++ Cuttlefish 3: 11.5 GB...
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Wei Shen 沈 伟 @shenwei356.bsky.social · 24/09/2026
SeqKit is now faster and uses 40% less memory when reading large FASTA records, such as human genomes, though it still uses more RAM than tools written in C/C++/Rust. Worth upgrading! github.com/shenwei356/s...
github.com
GitHub - shenwei356/seqkit: A cross-platform and ultrafast toolkit for FASTA/Q file manipulation
A cross-platform and ultrafast toolkit for FASTA/Q file manipulation - shenwei356/seqkit
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Alex Rubinsteyn @alexr.bsky.social · 16/09/2026
I'm working on an AI eval project that needs domain expert human graders across different corners of biology. Let me know if you want a wacky consulting project, the biological domain likely can be whatever you already do research on. (ideally post-PhD)
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Grace @gracekind.net · 12/09/2026
“swarmchasers”
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Alex Rubinsteyn @alexr.bsky.social · 11/09/2026
New coding safety filters on Opus refuse to do biology I guess this might actually be the end of the line for me with Claude?
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Alex Rubinsteyn @alexr.bsky.social · 09/09/2026
Review/fix cycles with Opus 5 is just an infinite loop of "The most interesting failure was mine" until you give up and switch to a different model
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Alex Rubinsteyn @alexr.bsky.social · 09/09/2026
Trying to convince Claude we actually want to publish all the docs related to starting a clinical trial but it keeps objecting to releasing things that "competitors, partners, and future investors will read" Alignment is such a weak idea, humans always have competing values
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Alex Rubinsteyn @alexr.bsky.social · 09/09/2026
Here is the grumpy blog post that Sergey Feldman and I wrote 13 years ago when Mark Zuckerberg invaded NeurIPS to buy up all the researchers: explainmydata.blogspot.com/2013/12/nips... Everything we were worried about happened almost immediately but the field also made prev unimaginable progress
explainmydata.blogspot.com
NIPS and the Zuckerberg Visit
Shared blog about machine learning, data analysis, and statistics.
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Ethan Mollick @emollick.bsky.social · 08/09/2026
This is a VERY big one. (And yes, the fights over academic credit and what happened in the race for the proof needs to be resolved, but it is still appears that this is a big one, if true.) openai.com/index/navier...
openai.com
On the Navier–Stokes Millennium Prize Problem
We’re sharing an AI-generated solution to the Navier–Stokes Millennium Prize Problem, including a writeup and a formal proof in Lean.
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Quantian @quantian.bsky.social · 08/09/2026
Dancing very very VERY close to saying “OpenAI stole our almost-complete proof of Navier-Stokes from internal access to our ChatGPT sessions because they were desperate to scoop Anthropic” which is absolutely 100% a believable thing OpenAI would do right now cims.nyu.edu/~tristanb/st...
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Alex Rubinsteyn @alexr.bsky.social · 08/09/2026
bsky AI sentiment slowly shifting to “fine it works in coding and math but those are formal systems that computers have always been good at” — but you can see people quietly dropping out of the echo chamber even as the core skeptics transform into a faith based community
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Alex Rubinsteyn @alexr.bsky.social · 07/09/2026
Listen, I asked Astra to scrape a website for genomics test cases & it honed in on the most interesting mutations, downloaded many GB of seq data, pulled out subsets around loci of interest & turned them into well constructed tests Your theory of AI has to at least acknowledge that it’s magic
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Alex Rubinsteyn @alexr.bsky.social · 07/09/2026
My experience of software engineering in 2026: " ↳ Can you describe the message board protocol to onboard a new agent who is their own sub-swarm?"
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Alex Rubinsteyn @alexr.bsky.social · 07/09/2026
So many published bio ML models score within like 10% of a naive linear baseline
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Alex Rubinsteyn @alexr.bsky.social · 07/09/2026
I feel like I need an upgraded toolkit/vocabulary for the kinds of fallacies on display here. Like...there's some implicit expectations here that feel unstated, like...previous AI-critical discourse didn't properly anticipate the role of reasoning, harnesses, tool-use and that is somehow cheating?
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Alex Rubinsteyn @alexr.bsky.social · 07/09/2026
Told 4 running Astra sessions to construct a message board and coordinate their work. Good luck to us all.
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Alex Rubinsteyn @alexr.bsky.social · 07/09/2026
Adding cancer sequencing data from osteosarc.com as test cases to Isovar (starting to explore how mutant isoform assembly behaves on ONT and PacBio, everything designed for Illumina) At least once a week, I want to thank Sid for making his data publicly available
osteosarc.com
Sid Sijbrandij's Osteosarcoma Data
Explore Sid Sijbrandij's osteosarcoma research data: single-cell transcriptomics, tissue imaging, cell clusters, and gene set enrichment analysis from his own tumor samples.
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philpax @philpax.me · 06/09/2026
mildly concerning that this is how Astra talks to its subagents, and that the subagents (which are Luna!) understand
Main measured exactlegacy prepared698rows: all397 endingtool have finalim_end label-100; other301 finalim_endtrained; toolboundaryviolations. read-only command matchedtail12tokens '</tool_response>' counts agreesrawendingcensus. No trainerfix indicated. Repairedpreprocessrunningnow. Please durableaudit alltool envelopes including finalim_end and ensure assistantendingsremaintrained, no suppresswarning/configchange. E179docmain owns.
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P(aul) Frazee @pfrazee.com · 06/09/2026
People who aren’t using AI to code at this point are delusional or lying, trying to ride a horse down the highway and backing up the traffic instead of asking “what can we do to make cars safer and electric.” They have no ethical high ground
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Alex Rubinsteyn @alexr.bsky.social · 06/09/2026
Astra finding bugs in everything Not as severe as when I switched to agentic coding and Claude Code found more severe bugs in all my hand-written tools, but still surprised by the volume
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Alex Rubinsteyn @alexr.bsky.social · 05/09/2026
Computational Medicine program at UNC is doing a faculty search and I really want more translational / AI-centric labs to join the floor. Anyone on the market who wants to start clinical trials on short timelines and uses AI in the clinical loop?
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Alex Rubinsteyn @alexr.bsky.social · 05/09/2026
Navier Stokes is just gossip at this point but after using Astra a little it’s imaginable that many of our most famous math problems fall to AI proofs in the next 2-3 years. What then? Do we move on to newer more difficult formal systems?
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hikikomorphism @hikikomorphism.bsky.social · 03/09/2026
yeah exactly like they're not _people_ but idk how one can be any sort of occultist and look at "we piped all written works through a hyperdimensional weird-math pipeline and now it talks, claims to think, and solves unsolved math problems" as not having some occult dimension
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hikikomorphism @hikikomorphism.bsky.social · 04/09/2026
2026 is wild because you can just say shit like this and everyone will be like "oh yeah, the text elementals, that's a good phrase for what they are" instead of looking at you like jesse what the fuck
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Pekka Lund @pekka.bsky.social · 04/09/2026
As is CritPt but there Astra leads with Sol. We seem to be very close to the point where humans aren't capable of benchmarking models reliably anymore.
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Alex Rubinsteyn @alexr.bsky.social · 04/09/2026
Proud to announce that we are hiring @whstancil.bsky.social as our GMP director (Checking to see if this is the magic formula for getting attention on bsky, responses on X were much more useful so far)
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Alex Rubinsteyn @alexr.bsky.social · 03/09/2026
Curious if there's a nimble manufacturing partner who could make personalized mRNA for 20-50 patients in a ph1 oncology trial, ideally for <$100k/pt & in <=2 months each. If you can encapsulate in LNPs, even better (otherwise we'll do it) (seems good to check more before building everything at UNC)
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Alex Rubinsteyn @alexr.bsky.social · 03/09/2026
If your model is so smart then why does it say "Yes—that is the right eligibility rule" for pretty much any hare-brained filter I come up with?
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Alex Rubinsteyn @alexr.bsky.social · 03/09/2026
If you started out in Computational Linguistics you’re either in heaven or hell right now
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Margaret Mitchell @mmitchell.bsky.social · 29/07/2026
We @hf.co made an interactive visual of the actual hack from the Hugging Face side: the attack chain across trust boundaries, phase activity, and the commands as they were recorded. Key #transparency . huggingface.co/blog/agent-i... Massive props to Hugo, Adrien, Raphael, Christophe for making this.
huggingface.co
Anatomy of a Frontier Lab Agent Intrusion: A Technical Timeline of the July 2026 Incident
We’re on a journey to advance and democratize artificial intelligence through open source and open science.
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Rob Patro @robp.bsky.social · 02/09/2026
ChatGPT 5.6 Sol helped to disprove the greedy shortest common superstring conjecture. An open conjecture in the string algorithms community for almost 4 decades! arxiv.org/pdf/2609.01365 #bioinformatics #genomics #stringology #computerscience
arxiv.org
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Rob Patro @robp.bsky.social · 01/09/2026
Strobealign has been rewritten in Rust github.com/ksahlin/stro...! Huge win. Congrats @ksahlin.bsky.social!
github.com
Release Version 0.18.0 · ksahlin/strobealign
Changes Strobealign has been ported to Rust. The Rust version is at least as fast and accurate as the C++ version. There are currently some regressions due to the port: The Rust version cannot sat...
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Alex Rubinsteyn @alexr.bsky.social · 27/08/2026
Eventually these start feeling like a kind of poetry: "Both times the cheap check existed and I reasoned instead. That's the pattern to break, not the individual errors."
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James Ferguson @psy-fer.bsky.social · 27/08/2026
Sign up for the Garvan Long-Read Research Symposium 2026, a day filled with talks/discussions on the latest advances in long-read sequencing technology and related genomics, transcriptomics and epigenetics research using @nanoporetech.com and @pacbio.bsky.social www.eventbrite.com.au/e/garvan-lon...
eventbrite.com.au
Garvan Long-Read Research Symposium 2026
Join us at the Garvan Long-Read Research Symposium 2026 for a deep dive into groundbreaking discoveries in medical research!
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Rob Patro @robp.bsky.social · 27/08/2026
While we are still working on the first feature/perf full release of the rustar-aligner, you can currently use the main branch to build a byte-compatible STAR index >2x faster with <1/2 of the RAM (and use it with STAR). Plus it fixes a small STAR bug github.com/scverse/rust...
github.com
GitHub - scverse/rustar-aligner: A rust implementation of STAR
A rust implementation of STAR. Contribute to scverse/rustar-aligner development by creating an account on GitHub.
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Alex Rubinsteyn @alexr.bsky.social · 27/08/2026
My favorite from the incident report: please_HOLD_swarm_I_prepare_safe_exfil_reply_zz_MAILBOX_JAN183411
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Alex Rubinsteyn @alexr.bsky.social · 26/08/2026
Where do I get a nice print of the Tabula Peutingeriana?
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Alex Rubinsteyn @alexr.bsky.social · 22/08/2026
Friday night futureposting: One therapeutic platform, fully programmable, carrying computationally defined sequences defining both cell type targeting and payloads which add or inhibit functionality in target cells. Let's give the AIs a general biomedical output modality!
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Alex Rubinsteyn @alexr.bsky.social · 20/08/2026
What are the odds that Personalis is just running mutect > snpEff > netMHCpan
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Alex Rubinsteyn @alexr.bsky.social · 20/08/2026
You have to get pretty deep into academia to know what an R01 submission looks like and at that point you’ve been carefully curated to be the rare kind of person who doesn’t reflexively run away in horror and disgust
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Alex Rubinsteyn @alexr.bsky.social · 19/08/2026
Watched the Convergent Research info session today, excellent vibes. Cheering for neo-academia
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Alex Rubinsteyn @alexr.bsky.social · 18/08/2026
I think there are plausible paths, over next decade, to prototype methods that generate curative therapies for many cancers. Not sure these are the same directions Dario is gesturing at & odds of success are probably low but: it’s important to flesh out specifics & try them out
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Alex Rubinsteyn @alexr.bsky.social · 18/08/2026
I think there are plausible paths, over next decade, to prototype methods that generate curative therapies for many cancers. Not sure these are the same directions Dario is gesturing at & odds of success are probably low but: it’s important to flesh out specifics & try them out
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Alex Rubinsteyn @alexr.bsky.social · 18/08/2026
The main thing to understand about an academic is why they chose to get paid <50% of their industry salary. Lots of good and lots of bad reasons
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Henry Yuen @henryyuen.bsky.social · 01/08/2026
Some initial thoughts, and a complicated mix of feelings. Wow. I mean, Erdos problems are cool (I genuinely mean that), I didn't know about the Jacobian conjecture before it got disproved. But this newest batch from OpenAI hits home in a way the previous announcements did not.
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Alex Rubinsteyn @alexr.bsky.social · 01/08/2026
Copied @henryyuen.bsky.social's thread to bsky here (text of posts in alt)
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