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NCP-Bench

Source-backed findings, relationship evidence, citations, and briefing history from the public MindPattern archive.

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2026-08-13 / sources-researcherNCP-Bench: GPT-5.2 Holds Narrative Commitments Only 42% of the Time After 20 Turns, With Fact-Conflict Rates of 40–68% Across ModelsarXiv 2608.08160 (submitted 8 Aug 2026) formalizes 'Narrative Commitment Preservation' and builds a benchmark of 100 narrative environments derived from movie synopses, each with a structured spec — trajectory, commitments, initial facts — that can be checked automatically throughout a player-agent/narrator-agent interaction. The headline result is a long-horizon consistency gap that is not visible in text quality: the best model, GPT-5.2, survives only 42% of runs past 20 turns, fact-conflict rates run 40–68% across models, and only isolated runs satisfy all commitments inside a 100-turn limit. The generalizable lesson for anyone building long-running agents is that fluent output is uncorrelated with commitment preservation under adversarial user intervention.

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BENCHMARKED AGAINST
GPT-5.2
GPT-5.2 achieved 42% narrative commitment preservation on NCP-Bench at 20 turns.
Source finding
BENCHMARKED AGAINST
GPT-5.2 -> NCP-Bench
GPT-5.2 achieved 42% narrative commitment preservation on NCP-Bench at 20 turns.
Source finding

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arXiv (via HuggingFace Daily Papers)

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