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Under Peer Review · Sparse Autoencoders for Pythia-70M-Deduped
Pythia-70M-Deduped
MLP Post
2-MLP-SM
22917
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MODEL
2-mlp-sm
Source/SAE
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Explanations
references to historical or significant artifacts and their contexts
oai_token-act-pair · gpt-4o-mini
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claude-4-5-haiku
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Intrusion Detection
Top Features by Cosine Similarity
Configuration
ctigges/pythia-70m-deduped__mlp-sm_processed/2-mlp-sm
How To Load
Prompts (Dashboard)
32,768 prompts, 128 tokens each
Dataset (Dashboard)
monology/pile-uncopyrighted
Features
32,768
Data Type
torch.float32
Hook Name
blocks.2.hook_mlp_out
Hook Layer
2
Architecture
standard
Context Size
128
Dataset
EleutherAI/the_pile_deduplicated
Activation Function
relu
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https://www.neuronpedia.org/pythia-70m-deduped/2-mlp-sm/22917?embed=true&embedexplanation=true&embedplots=true&embedsteer=true&embedactivations=true&embedlink=true&embedtest=true
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Neuron Alignment
Index
Value
% of L₁
70
+0.12
0.7%
145
+0.12
0.7%
266
+0.11
0.6%
Correlated Neurons
Index
P. Corr.
Cos Sim.
70
+0.12
0.08
497
+0.12
0.02
266
+0.11
0.02
Negative Logits
-1.58
>;
-1.56
-1.49
merged
-1.41
spanned
-1.39
?:
-1.39
olite
-1.39
){
-1.34
architect
-1.32
[_
-1.30
POSITIVE LOGITS
↵ âĢĥ
2.44
2.44
2.44
↵ ↵
2.44
<|outofrange|>
2.44
2.44
<|outofrange|>
2.44
2.44
<|outofrange|>
2.44
2.44
Act
ivations
Density 0.991%
Stacked
Snippet
Full
Show Breaks
Hide Breaks
No Known Activations