Chris Ge (@ChrisGe05) profile picture

Working on interpretability @MIT_CSAIL CS @MIT, ex HRT intern

Joined October 2025
Photo by Chris Ge (@ChrisGe05)Photo by Chris Ge (@ChrisGe05)Photo by Chris Ge (@ChrisGe05)Photo by Chris Ge (@ChrisGe05)Photo by Chris Ge (@ChrisGe05)Photo by Chris Ge (@ChrisGe05)Photo by Chris Ge (@ChrisGe05)
Chris Ge retweeted
New Paper 📄: LMs just want to explain themselves! When we SFT an LM on explanations of its own behaviors, do they learn to actually introspect, or do they merely imitate the original training distribution? We find evidence for the former. Despite training on a static set of explanations from a base model, the SFT-ed model explains its own current behaviors better than the base model’s behaviors, tracking behavioral drift even when we don’t explicitly train it to. We call this introspective coupling: self-explanations track a model’s own behavior as that behavior changes, and it shows promise in making introspection training a part of scalable post-training pipelines. 🧵
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Chris Ge retweeted
New @fulcrum_inc research: Inverse Rubric Optimization (IRO), a testbed for agent science. Long-horizon tasks are often noisy, making them hard to study. In IRO, an agent learns a hidden judge's preferences under a label budget. We observe rich agent behavior and smooth scaling.
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Chris Ge retweeted
How can we tell whether a brain region causally represents a visual concept, rather than merely correlating with it? Introducing BrainCause, a framework combining generative and brain models to create controlled stimuli and causally test neural representations. More below 🧠👇
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For more qualitative and quantitative results, check out our paper and project page. Project: chrisg777.github.io/i2i-inte… Code: github.com/ChrisG777/i2i-int… Paper: arxiv.org/abs/2605.24624 This work was done in collaboration with @rohitgandikota, Antonio Torralba, and @TamarRottShaham
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Our findings suggest an efficiency opportunity: for some image editing tasks, once the text tokens have absorbed the reference content, the reference image no longer needs to participate in the rest of the computation.
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I2I → I2I Patching shows the text-token activations themselves causally carry the reference content. We transplant them from one edit run into another with a different reference image, and the source's reference-specific properties transfer over.
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T2I Lens shows what's encoded in the text tokens; Attention Knockout tests if the model causally uses that content. Block the text pathway: color and style collapse. Block the direct reference-to-output pathway and the color and style remain unchanged.
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Within the text tokens, the reference content actually lives in the padding tokens 🟦, the filler slots after your prompt ends. Patching just those recovers the general semantics of the reference scene, while the content tokens carry only the edit itself.
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T2I Lens 🔍: what do the text tokens carry at intermediate layers? We decode the text-token activations at each layer back into images by patching them as the input to layer 0 of a T2I run. The reference image's content shows up there, even though the prompt never mentioned it."
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In FLUX.2, text, reference image, and output image tokens are all combined into a single multimodal attention stream. We probe what the text tokens carry through three interventions: T2I Lens (read), Attention Knockout (sever), I2I-to-I2I Patching (transfer).
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FLUX.2's @bfl_ml text tokens aren't just holding your prompt. During image editing, they absorb reference image content, and some of that absorbed content, like color and style, causally drives the output appearance. New paper 🧵👇
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Come check out our work on better utilizing agentic coding benchmark evaluation data, presented at #ICLR2026 Agents in the Wild Workshop!
Today’s coding agent evals = single-number benchmark accuracies. But this obscures important details: which tasks in a benchmark are harder, and why? We study agent performance at the task level, and predict how new agents perform on new tasks. 📃To appear at ICLR 2026 AIWILD!
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Chris Ge retweeted
🚨 We're open-sourcing Druids, a library for coordinating and deploying coding agents across machines. Our beta users have used Druids to work on open math problems, conduct ML "autoresearch," and make software faster.
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