Theofanis Karaletsos Profile
Theofanis Karaletsos

@Tkaraletsos

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Head of AI @cziscience | https://t.co/TIpJn8YQlg | probabilistic and deep ML

Joined December 2013
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@Tkaraletsos
Theofanis Karaletsos
7 years
Keep calm and apply Bayes' Rule.
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@Tkaraletsos
Theofanis Karaletsos
1 day
RT @thjashin: Autoregressive models are too restrictive by forcing a fixed generation order, while masked diffusion is wasteful as it fits….
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@Tkaraletsos
Theofanis Karaletsos
6 days
Proud to share a big step toward building systems that help us simulate and predict the behavior of cells!. GREmLN is a graph-based transformer model, designed to reason across biological data by embedding gene regulatory network architecture directly into its attention.
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@Tkaraletsos
Theofanis Karaletsos
17 days
Fun write up by @ElliotHershberg on virtual cells.
@ElliotHershberg
Elliot Hershberg
17 days
What Are Virtual Cells?. Two months ago, I started working on an essay to answer this question. The goal was to cover a few of the recent research results. Simple as that!. Instead, I went down a rabbit hole exploring ideas around cellular simulation
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@Tkaraletsos
Theofanis Karaletsos
2 months
ICML 25 paper on variational guidance for diffusion models accepted. Happy to share that our diffusion model guidance paper with @farrinsofian, @kpandey008, @felixDrRelax, and @StephanMandt on casting control for guidance as variational inference with auxiliary variables was.
@farrinsofian
Farrin Marouf Sofian
2 months
🚀 News! Our recent #ICML2025 paper “Variational Control for Guidance in Diffusion Models” introduces a simple yet powerful method for guidance in diffusion models — and it doesn’t need model retraining or extra networks. 📄 Paper: 💻 Code:
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@Tkaraletsos
Theofanis Karaletsos
2 months
Is this the greek version of Wrexham?.Go @kostascrypto !.
@kostascrypto
Kostas Kryptos
2 months
⚽️ Just backed a small football team from the birthplace of Aristotle in 🇬🇷 . in a lower division today, but aiming for the national leagues, and hence why they do need modernization!. With support from Sui, we’re bringing blockchain to the pitch: on-chain stats, NFTs,.
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@Tkaraletsos
Theofanis Karaletsos
2 months
Of course a deeper error analysis here will eventually reveal what actually works and why, and whether it captures perturbations or just basal states very well, but I really enjoy seeing these little results and explorations.
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@Tkaraletsos
Theofanis Karaletsos
2 months
And the result!
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@Tkaraletsos
Theofanis Karaletsos
2 months
And Virtual Cell Platform entry:. 4/4.
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@Tkaraletsos
Theofanis Karaletsos
2 months
And our paper:. 3/4.
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@Tkaraletsos
Theofanis Karaletsos
2 months
Adding our model overview again:. 2/4.
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@Tkaraletsos
Theofanis Karaletsos
2 months
Thanks to the @tahoe_ai hackathon and the amazing team that did the OODyssey work I learned sth new about our recently released Transcriptformer model: .It did well in the wild on disease-relevant, unseen (in this case cellular drug perturbation) data that they use for their drug.
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@Tkaraletsos
Theofanis Karaletsos
3 months
RT @cziscience: TranscriptFormer is a new AI model trained on millions of cells from 12 different species, spanning 1.5 billion years of ev….
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@Tkaraletsos
Theofanis Karaletsos
3 months
Model overview:
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@Tkaraletsos
Theofanis Karaletsos
3 months
Paper:
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@Tkaraletsos
Theofanis Karaletsos
3 months
Proud to share TranscriptFormer - a generative model for single-cell transcriptomics, trained on 112 million cells across 12 species spanning 1.5 billion years of evolution. TranscriptFormer is distinct in being both generative and multi-species. Built entirely on raw gene.
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@Tkaraletsos
Theofanis Karaletsos
3 months
RT @zavaindar: long public biotech. long early stage AI and infra.
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@Tkaraletsos
Theofanis Karaletsos
4 months
RT @nalidoust: Meet the judges & mentors for the Tahoe Deep Dive Hackathon & thanks @awscloud for offering the prize: $25K AWS credits to w….
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@Tkaraletsos
Theofanis Karaletsos
5 months
RT @zavaindar: We're launching ACHIRA, a newco DIMENSION cofounded alongside @jchodera & @tkaraletsos. We're building foundation simulation….
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@Tkaraletsos
Theofanis Karaletsos
5 months
I also want to point out how exciting it is to be part of two concurrent revolutions in AI in the life sciences between the virtual cell work we pioneer at @cziscience and the AI for atomistic simulations for drug discovery with Achira. Chemistry and biology are inextricably.
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@Tkaraletsos
Theofanis Karaletsos
5 months
We are very excited for the enthusiastic support from @_DimensionCap , @AmplifyPartners , @nvidia , and @CompoundVC who are all bought in to the impact this work will bring.
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