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🧠 AI🔴 BearishImportance 7/10

CostBench: Evaluating Multi-Turn Cost-Optimal Planning and Adaptation in Dynamic Environments for LLM Tool-Use Agents

arXiv – CS AI|Jiayu Liu, Cheng Qian, Zhaochen Su, Qing Zong, Shijue Huang, Bingxiang He, Yi R. Fung|
🤖AI Summary

Researchers introduce CostBench, a new benchmark for evaluating AI agents' ability to make cost-optimal decisions and adapt to changing conditions. Testing reveals significant weaknesses in current LLMs, with even GPT-5 achieving less than 75% accuracy on complex cost-optimization tasks, dropping further under dynamic conditions.

Key Takeaways
  • CostBench introduces the first comprehensive benchmark focused on economic reasoning and cost-optimal planning for AI agents.
  • Current AI agent evaluations overlook critical resource efficiency and adaptability capabilities in favor of simple task completion.
  • Even advanced models like GPT-5 struggle with cost-optimization, achieving less than 75% accuracy on the most challenging tasks.
  • Performance drops approximately 40% when agents must adapt to dynamic conditions like tool failures and cost changes.
  • The benchmark reveals a substantial gap between current AI capabilities and real-world economic decision-making requirements.
Mentioned in AI
Models
GPT-5OpenAI
Read Original →via arXiv – CS AI
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