Action post-training of a VLM into a VLA produces a persistent depth-decodability floor and a specific late-layer cliff caused by interference from late MLP writes.
Transformer Circuits Thread (2021),https: //transformer-circuits.pub/2021/framework/index.html
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From Recovery to Drop-off: How Action Post-training Reduces a VLM's Late-Layer Depth Decodability
Action post-training of a VLM into a VLA produces a persistent depth-decodability floor and a specific late-layer cliff caused by interference from late MLP writes.