ResearchResearch paperLarge Language Models1 source · Oct 13, 2026

Encoding Context into LLM Weights: What Makes It Context?

Longer contexts allow large language models (LLMs) to condition their predictions on more information, but inference costs grow prohibitively with context length.

Key points

  • An emerging alternative uses test-time updates to encode context as temporary changes to model weights.
  • However, encoding this information into weights that already represent general knowledge obscures its role as context, so the LLM may fail to use it properly to condition subsequent inference.
  • Invoking the identifier at inference then enables the LLM to recite the encoded context.
  • We therefore further introduce a prompting framework that explicitly guides the LLM to use this information as context.

Sources (1)

  • [1]Encoding Context into LLM Weights: What Makes It Context?
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 13, 04:08 AM
    Longer contexts allow large language models (LLMs) to condition their predictions on more information, but inference costs grow prohibitively with context length.
    An emerging alternative uses test-time updates to encode context as temporary changes to model weights.

Extractive summary: sentences quoted from the sources.

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