On the Non-Identifiability of Steering Vectors in Large Language Models

📰 ArXiv cs.AI

Steering vectors in large language models are non-identifiable due to equivalence classes of behaviorally equivalent models

advanced Published 2 Apr 2026
Action Steps
  1. Understand the concept of steering vectors and their role in controlling LLM behavior
  2. Recognize the assumption of identifiability of steering vectors and its implications
  3. Analyze the equivalence classes of behaviorally equivalent models and their impact on steering vector identifiability
  4. Consider the implications of non-identifiability on the interpretation and reliability of LLMs
Who Needs to Know This

ML researchers and AI engineers benefit from understanding the limitations of steering vectors in controlling LLM behavior, as it affects the interpretability and reliability of their models

Key Insight

💡 Steering vectors are not uniquely recoverable from input-output behavior, limiting their interpretability and reliability

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🚨 Steering vectors in LLMs are non-identifiable! 🤖
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