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TwinCheck: Evidence-Grounded Negative-Twin Verification for Stateful Tool Agents
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verificationagent performancecounterfactuals
2609.26911
Builder Relevance
1d ago80%
Abstract
TwinCheck introduces a verification policy that enhances agent performance by replacing tool calls only when certain evidence conditions are met.
Reality Card
Core Claim
The complete policy raises task success for GPT-5.6 Sol from 45.3% to 58.5% without any observed regressions in success-to-failure rates.
Method / Result
The policy improved task success rates by 13.2 percentage points in a study of 159 multi-turn BFCL V4 tasks.
Limitations
The paper does not specify the authors, which may limit reproducibility and transparency.
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