When Models Talk the Talk but Don't Walk the Walk: A Journey into LLM Behavioral Consistency

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TL;DR: We fine-tuned a security agent on 54 task chains, achieved 100% skill differentiation in probing tests, but discovered the model collapsed to a single behavior in real deployment. This gap between “what the model knows” and “what the model does” led us to develop a trust diagnostic framework for evaluating fine-tuned models. The Starting Point: Can Models Improve…

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