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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 presents a comprehensive survey of verifier-based 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 using 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 one. This paper presents an integrated view of various verification approaches and their training mechanisms, and covers the types and utility of verifiers fine-tuned with prompt-based, discriminative, or generative models. We share related research through the GitHub repository ( https://github.com/elixir-research-group/Verifierstesttimescaling.github.io) .

Takeaways, Limitations

Takeaways: Contributes to future research and development by providing a comprehensive understanding of various TTS verifier approaches and training mechanisms. It demonstrates the efficiency and potential for significant performance improvements through parameter-free inference time extension.
Limitations: This study is limited to examining currently proposed validator approaches and training mechanisms and may not encompass new approaches in the future. In-depth analysis or comparative studies of validator performance may be lacking. Further analysis of the effectiveness of validators for specific types of LLM or specific tasks may be needed.
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