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The Fifth Turn Is Not the Finish Line: Measuring Sycophancy Under Sustained Pressure

TL;DR for operators An assistant can answer correctly at the start of a conversation and still give way after enough pushback. In SPINE, a benchmark that continues adaptive disagreement for as many as 25 turns, cumulative collapse rises with conversation length for every evaluated model. That means a model passing a one-shot or five-turn test has not demonstrated that it will preserve the same position through a longer interaction. ...

October 8, 2026 · 8 min · Zelina