# Forward-Pass-Only Fine-Tuning Claims Roughly Three Times the Throughput of Standard Adaptation

The method skips backpropagation through the model body and reports about 40 percent lower peak training memory.

- Published: 2026-08-19T06:20:14.557Z
- Canonical: https://polylog.news/ai/2026-08-19/forward-pass-only-fine-tuning-claims-roughly-three-times-the
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [arXiv cs.LG](https://arxiv.org/abs/2608.14563)

A preprint on Forward Pass Domain Adaptation describes Forward-Pass-Only multilayer perceptron training, called FPO, a method that adapts a large language model (LLM) without running a backward pass through the model's main body. The author…

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