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Yirou Ge

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Yixi Li

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Alec Chiu

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Shivani Shekhar

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References (12)

[1]
Just Enough Thinking: Efficient Reasoning with Adaptive Length Penalties Reinforcement Learning
2025Violet Xiang, Chase Blagden et al.
[2]
Thinkless: LLM Learns When to Think
2025Gongfan Fang, Xinyin Ma et al.
[3]
AdaptThink: Reasoning Models Can Learn When to Think
2025Jiajie Zhang, Nianyi Lin et al.
[4]
AdaCoT: Pareto-Optimal Adaptive Chain-of-Thought Triggering via Reinforcement Learning
2025Chenwei Lou, Zewei Sun et al.
[5]
Learning When to Think: Shaping Adaptive Reasoning in R1-Style Models via Multi-Stage RL
2025Songjun Tu, Jiahao Lin et al.
[6]
Reasoning Models Can Be Effective Without Thinking
2025Wenjie Ma, Jingxuan He et al.
[7]
Think When You Need: Self-Adaptive Chain-of-Thought Learning
2025Junjie Yang, Ke Lin et al.
[8]
Stop Overthinking: A Survey on Efficient Reasoning for Large Language Models
2025Yang Sui, Yu-Neng Chuang et al.
[9]
DeepSeek-R1: Incentivizing Reasoning Capability in LLMs via Reinforcement Learning
2025Adam Suma, Samuel Dauncey
[10]
DeepSeekMath: Pushing the Limits of Mathematical Reasoning in Open Language Models
2024Zhihong Shao, Peiyi Wang et al.
[11]
Statistical Rejection Sampling Improves Preference Optimization
2023Tianqi Liu, Yao Zhao et al.
[12]
Direct Preference Optimization: Your Language Model is Secretly a Reward Model
2023Rafael Rafailov, Archit Sharma et al.

Founder's Pitch

"Efficiently optimize reasoning in AI models for latency-sensitive applications via Ada-RS."

AI Efficiency SolutionsScore: 7View PDF ↗

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10

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5

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Why It Matters

This research is important as it addresses the critical issue of efficiency in AI models, which often face cost and latency constraints in practical applications like customer service or e-commerce platforms. Ada-RS enhances reasoning efficiency without sacrificing accuracy, allowing AI applications to be more responsive and cost-effective.

Product Angle

To productize, create an API or SDK that can integrate Ada-RS into existing AI models used by companies focusing on latency-sensitive interactions. Market it towards sectors that require quick customer interactions, like e-commerce or banking.

Disruption

Ada-RS replaces existing, less efficient AI reasoning processes, offering a significant improvement in speed and cost-effectiveness for similar accuracy.

Product Opportunity

This solution targets a substantial market, as many businesses in fields like e-commerce, financial services, and IT support are moving towards AI solutions for customer interaction but face challenges with the cost and speed of responses.

Use Case Idea

Commercial application could be in developing AI customer service chatbots that efficiently manage reasoning processes, balancing response quality and speed to handle user queries more effectively at a lower computational cost.

Science

The paper introduces Adaptive Rejection Sampling (Ada-RS), an approach to filter learning samples for AI models, particularly in tool-using contexts. It scores various outputs with an adaptive length-penalized reward to maintain efficiency. By retaining only high-reward outputs, the method maintains accuracy while reducing token use.

Method & Eval

Tested using the Qwen3-8B model in an e-commerce setting. Results showed substantial reductions in token usage and thinking rate while maintaining, or improving, tool call accuracy, demonstrating enhanced efficiency in model reasoning.

Caveats

The main limitation lies in the potential variability of Ada-RS's effectiveness across different domains, especially if the nature of tasks is drastically different from those tested. The reliance on synthesized datasets for evaluation might not represent all real-world scenarios.

Author Intelligence

Yirou Ge

PayPal AI

Yixi Li

PayPal AI

Alec Chiu

PayPal AI

Shivani Shekhar

PayPal AI

Zijie Pan

PayPal AI

Avinash Thangali

PayPal AI

Yun-Shiuan Chuang

PayPal AI

Chaitanya Kulkarni

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Uma Kona

PayPal AI

Linsey Pang

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Prakhar Mehrotra

PayPal AI