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One Success Isn't Reliability: Thinkingbox, a Sandbox and Benchmark for Agents in Stateful Business Workflows

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Merged summary

TL;DR - Thinkingbox is an MCP-compatible sandbox and 507-workflow benchmark for testing agents on policy-constrained, stateful business tasks. Results reveal a major reliability gap: the best model reaches 65.36% pass@1 but succeeds across 20 attempts only 25.25% of the time.

  • Covers multi-turn workflows in retail, hospitality, insurance, banking, consulting IT, and HR support.
  • Evaluates terminal backend state with task-specific executable checks that detect missing, incorrect, or unintended side effects.
  • Provides isolated tool sessions, complete execution traces, and final-response checks for designated tasks.
  • Clean termination and valid state-changing tool calls often still produce failed outcomes, making tool-level signals poor proxies for end-to-end success.

Sources (1)

One Success Isn't Reliability: Thinkingbox, a Sandbox and Benchmark for Agents in Stateful Business Workflows

arXiv cs.CL Zhuochun Li, Youngmin Ko, Ali Keramati, Nicola Ferri, Susana Palmaz Lopez Pelaez, Liang-Chun Tsai, Calvin Wang, Mirco Milletari, Tuhin Kundu, Vadim Smolyakov, Kjartan Olafsson, Tommy Guy 2026-08-20 arXiv:2608.19741
Public signals Hugging Face upvotes 12
Providers: Hugging Face · Upvotes 12 OpenAlex · N/A Publisher · N/A Semantic Scholar · N/A X · N/A Fetched 2026-09-19 14:25:40.512625 UTC

TL;DR - Thinkingbox is an MCP-compatible sandbox and 507-workflow benchmark for testing agents on policy-constrained, stateful business tasks. Results reveal a major reliability gap: the best model reaches 65.36% pass@1 but succeeds across 20 attempts only 25.25% of the time.

  • Covers multi-turn workflows in retail, hospitality, insurance, banking, consulting IT, and HR support.
  • Evaluates terminal backend state with task-specific executable checks that detect missing, incorrect, or unintended side effects.
  • Provides isolated tool sessions, complete execution traces, and final-response checks for designated tasks.
  • Clean termination and valid state-changing tool calls often still produce failed outcomes, making tool-level signals poor proxies for end-to-end success.
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