2026.TA.gemma2_2b_tc8192_decb_l1w0.001_tarbb_lb2.0_ln1_dr20000_lr8e-04_bs4_sl14793860

Sparse transcoder adapter trained with bridging mode.

Model Details

• Base model: google/gemma-2-2b
• Reference model: google/gemma-2-2b-it
• Architecture: gemma2
• Training mode: bridging
• Tokenizer: google/gemma-2-2b-it
• Training config: training-config.yaml
• GitHub: https://github.com/Sid-MB/transcoder-adapters
• W&B run: https://wandb.ai/siddharth-stanford/sparse-adaptation/runs/lfwst54h

Transcoder Configuration

• n_features: 8192
• dec_bias: True
• l1_weight: 0.001

Training

• Learning rate: 0.0008
• Batch size: 4
• Epochs: 1
• Warmup ratio: 0.05
• Loss type: kl
• lambda_adapt: 1.0
• lambda_bridge: 2.0
• lambda_nmse: 1
• n_cutoffs: 1
• backbone: target

Training Data

• siddharthmb/2026.transcoder-adapters.lmsys-chat-1m-splits