ResearchResearch paperImage, Video & 3D Generation · Evaluation & Benchmarks2 sources · Oct 16, 2026

Execution Before Memory: Diagnosing Memory Failures in Video World Models

A memory test for a video world model should say whether the scene was set, whether the asked change was carried out, and whether the last frame shows the result.

Key points

  • When the change is not carried out, the hidden state transition cannot appear, so the test is not really a test of memory.
  • We introduce MIST, an evaluation that separates the change from the memory it should leave behind.
  • The same gap appears in general memory evaluations.
  • On that basis we propose M3-Agent (Make the Missing Move), which recursively revises the details of the input instruction so that the model successfully carries out the requested instruction.

Sources (2)

Extractive summary: sentences quoted from the sources.

Before this

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  4. Oct 15, 2026CoWorld Reasoner: Agentic Multimodal Reasoning with the Evolving Video World Model-Driven Harness
  5. Oct 15, 2026Velox: Spatial Memory Makes World Models Efficient
  6. Oct 14, 2026Sparse Transformer: a Controlled Testbed for Mechanistic Interpretability

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