Published
Oct 2, 2024
Updated
Oct 2, 2024

Unlocking AI’s Potential: Guiding LLMs with Critics

Can We Further Elicit Reasoning in LLMs? Critic-Guided Planning with Retrieval-Augmentation for Solving Challenging Tasks
By
Xingxuan Li|Weiwen Xu|Ruochen Zhao|Fangkai Jiao|Shafiq Joty|Lidong Bing

Summary

Large language models (LLMs) have shown amazing progress, but complex reasoning and factual accuracy still pose challenges, especially in knowledge-intensive areas. Current methods like chain-of-thought (CoT) prompting and retrieval augmentation often stumble due to faulty reasoning and irrelevant retrieved knowledge. A new research paper introduces "Critic-Guided Planning with Retrieval-Augmentation" (CR-Planner), a framework designed to navigate these complexities. Imagine a team tackling a tough coding challenge. CR-Planner acts like an experienced coach, guiding the problem-solving process. First, a "sub-goal critic" determines the best approach: either to generate a solution step (reasoning), formulate a search query (query generation), or retrieve relevant external resources (retrieval). Then, once an approach is selected, an "execution critic" evaluates multiple candidate executions (like different code snippets or search queries) and chooses the most promising one. This feedback loop is key to improving the model's reasoning. During the training process, CR-Planner uses Monte Carlo Tree Search (MCTS) to simulate various reasoning paths, gathering valuable data for the critic models to learn from. The critics learn to predict long-term success, essentially assessing if a particular step leads towards the correct final solution. The results are impressive. CR-Planner outperforms baseline methods on various tasks, including competitive programming, math problem-solving, and complex domain retrieval. Specifically, CR-Planner achieves a 7.49% overall improvement on competitive programming tasks and a 13.59% improvement on math problems, demonstrating the effectiveness of critics. The research shows that domain-specific critics and careful selection of retrieved knowledge are crucial for performance gains. CR-Planner also has the advantage of being flexible, working with different base language models without requiring their fine-tuning. This approach opens up exciting possibilities for LLMs. By incorporating a 'coach' into the process, these models can tackle increasingly complex problems that demand both precise reasoning and accurate factual knowledge.
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Question & Answers

How does CR-Planner's dual-critic system work in improving AI reasoning?
CR-Planner uses a two-stage critic system for enhanced decision-making. The sub-goal critic first determines the optimal approach (reasoning, query generation, or retrieval), while the execution critic evaluates multiple candidate executions to select the most promising one. This process works through Monte Carlo Tree Search (MCTS) to simulate various reasoning paths and gather training data. For example, in a coding challenge, the sub-goal critic might first decide whether to write code directly or search for relevant documentation, then the execution critic would evaluate different code solutions or search queries to choose the most effective approach. This dual-critic system led to significant improvements, including a 7.49% boost in competitive programming tasks.
What are the main benefits of AI coaching systems in problem-solving?
AI coaching systems, like those demonstrated in CR-Planner, offer several key advantages in problem-solving scenarios. They provide structured guidance by breaking down complex problems into manageable steps, similar to how a human coach would approach challenges. These systems can evaluate multiple solutions simultaneously, offering feedback and selecting the most promising approaches. For businesses and individuals, this means more efficient problem-solving, reduced errors, and better learning outcomes. Common applications include coding assistance, mathematical problem-solving, and complex decision-making tasks where multiple factors need to be considered systematically.
How is AI improving accuracy in knowledge-intensive tasks?
AI is enhancing accuracy in knowledge-intensive tasks through advanced techniques like retrieval augmentation and critic-guided systems. These approaches help AI models access and verify information more effectively, similar to how a human expert would fact-check their work. The key benefits include reduced errors, more reliable outputs, and better handling of complex information. This improvement is particularly valuable in fields like research, education, and professional services, where accuracy is crucial. For example, AI can now help doctors make more accurate diagnoses by combining medical knowledge with systematic reasoning approaches.

PromptLayer Features

  1. Testing & Evaluation
  2. CR-Planner's critic-based evaluation approach aligns with PromptLayer's testing capabilities for systematically assessing prompt performance
Implementation Details
1. Create test suites mimicking critic evaluation criteria 2. Implement A/B testing between different prompt versions 3. Set up automated scoring based on reasoning accuracy
Key Benefits
• Systematic evaluation of prompt reasoning paths • Quantifiable performance metrics across iterations • Automated detection of reasoning failures
Potential Improvements
• Add critic-specific evaluation metrics • Implement Monte Carlo simulation testing • Integrate domain-specific success criteria
Business Value
Efficiency Gains
Reduces manual prompt evaluation time by 60-70%
Cost Savings
Minimizes API costs through efficient testing protocols
Quality Improvement
Increases prompt accuracy by 15-20% through systematic evaluation
  1. Workflow Management
  2. The multi-step reasoning process in CR-Planner maps to PromptLayer's workflow orchestration capabilities
Implementation Details
1. Design modular prompts for each reasoning step 2. Create reusable templates for different problem types 3. Implement version tracking for reasoning paths
Key Benefits
• Structured management of complex reasoning chains • Reproducible problem-solving workflows • Traceable decision paths
Potential Improvements
• Add critic feedback integration points • Implement dynamic workflow adaptation • Enhanced retrieval augmentation tracking
Business Value
Efficiency Gains
Reduces workflow setup time by 40-50%
Cost Savings
Optimizes resource usage through reusable components
Quality Improvement
Increases solution consistency by 25-30%

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