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Trust but Verify! A Survey on Verification Design for Test-time Scaling

Created by
  • Haebom

Author

V Venktesh, Mandeep Rathee, Avishek Anand

Outline

This paper surveys the role of the verifier and various approaches in Test-Time Scaling (TTS), a novel method for improving the performance of large-scale language models (LLMs). TTS improves the inference process and task performance of LLMs by utilizing more computational resources during the inference process. The verifier acts as a reward model that evaluates candidate outputs generated during the decoding process and selects the optimal output. It has emerged as a promising approach due to its parameter-free scaling and high performance. This paper presents an integrated perspective on various verification methods and their training mechanisms presented in previous studies, covering various types of verifiers, including prompt-based, discriminative, or generative models fine-tuned. The paper provides a related code repository ( https://github.com/elixir-research-group/Verifierstesttimescaling.github.io) .

Takeaways, Limitations

Takeaways:
By systematically organizing the role and importance of verifiers in TTS and presenting various approaches in an integrated manner, we provide a comprehensive understanding of TTS research.
Provides insights into the training methods, types, and usefulness of verifiers in TTS.
Contribute to the reproducibility and advancement of TTS research through the provided code repository.
Limitations:
This paper is a survey paper and does not present a new methodology.
Detailed analysis of the verifier's performance evaluation may be lacking.
A more in-depth comparative analysis of the relative pros and cons of various verification methods is needed.
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