Conditional Language Policy: A General Framework for Steerable Multi-Objective Finetuning

• URL: http://arxiv.org/abs/2407.15762v2
• Date: Wed, 23 Oct 2024 17:42:39 GMT
• Title: Conditional Language Policy: A General Framework for Steerable Multi-Objective Finetuning
• Authors: Kaiwen Wang, Rahul Kidambi, Ryan Sullivan, Alekh Agarwal, Christoph Dann, Andrea Michi, Marco Gelmi, Yunxuan Li, Raghav Gupta, Avinava Dubey, Alexandre Ramé, Johan Ferret, Geoffrey Cideron, Le Hou, Hongkun Yu, Amr Ahmed, Aranyak Mehta, Léonard Hussenot, Olivier Bachem, Edouard Leurent,
• Abstract summary: Conditional Language Policy (CLP) is a framework for finetuning language models on multiple objectives. We show that CLP learns steerable models that effectively trade-off conflicting objectives at inference time.
• Score: 72.46388818127105
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Reward-based finetuning is crucial for aligning language policies with intended behaviors (e.g., creativity and safety). A key challenge is to develop steerable language models that trade-off multiple (conflicting) objectives in a flexible and efficient manner. This paper presents Conditional Language Policy (CLP), a general framework for finetuning language models on multiple objectives. Building on techniques from multi-task training and parameter-efficient finetuning, CLP learn steerable models that effectively trade-off conflicting objectives at inference time. Notably, this does not require training or maintaining multiple models to achieve different trade-offs between the objectives. Through extensive experiments and ablations on two summarization datasets, we show that CLP learns steerable language models that outperform and Pareto-dominate the existing approaches for multi-objective finetuning.

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