A Survey of Automatic Prompt Engineering: An Optimization Perspective

• URL: http://arxiv.org/abs/2502.11560v1
• Date: Mon, 17 Feb 2025 08:48:07 GMT
• Title: A Survey of Automatic Prompt Engineering: An Optimization Perspective
• Authors: Wenwu Li, Xiangfeng Wang, Wenhao Li, Bo Jin,
• Abstract summary: This paper presents the first comprehensive survey on automated prompt engineering through a unified optimization-theoretic lens. We formalize prompt optimization as a problem over discrete, continuous, and hybrid prompt spaces. We highlight underexplored frontiers in constrained optimization and agent-oriented prompt design.
• Score: 18.933465526053453
• License:
• Abstract: The rise of foundation models has shifted focus from resource-intensive fine-tuning to prompt engineering, a paradigm that steers model behavior through input design rather than weight updates. While manual prompt engineering faces limitations in scalability, adaptability, and cross-modal alignment, automated methods, spanning foundation model (FM) based optimization, evolutionary methods, gradient-based optimization, and reinforcement learning, offer promising solutions. Existing surveys, however, remain fragmented across modalities and methodologies. This paper presents the first comprehensive survey on automated prompt engineering through a unified optimization-theoretic lens. We formalize prompt optimization as a maximization problem over discrete, continuous, and hybrid prompt spaces, systematically organizing methods by their optimization variables (instructions, soft prompts, exemplars), task-specific objectives, and computational frameworks. By bridging theoretical formulation with practical implementations across text, vision, and multimodal domains, this survey establishes a foundational framework for both researchers and practitioners, while highlighting underexplored frontiers in constrained optimization and agent-oriented prompt design.

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