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Context

noun

The material an AI is given for one piece of work. Everything it knows about your client comes from it.

A paraplanner is checking an AI draft of Helen Marsh's annual review letter. The draft describes Helen as a cautious investor and suggests moving part of her portfolio into lower-risk funds to match. The paraplanner knows this is wrong. At last year's review, Helen agreed to a balanced attitude to risk, and her portfolio was changed to suit it.

The whole client folder had been uploaded, and it held two fact-finds: one from 2023 and one updated at last year's review. Both were dated. Nothing told the AI that the newer one replaced the older, and the draft followed the 2023 version. The suggestion to move into lower-risk funds rests on that choice, so correcting one sentence would still leave the letter wrong. The letter needs redrafting from the current fact-find.

Everything the AI was given is its context. Context is the material an AI system is given for one piece of work. It includes the question and the client's documents, and usually instructions added by the software that the user never sees. The AI's general knowledge comes from its training, the process that built it before any firm used it. What it knows about this client comes from the context and nowhere else.

In a firm, context is the file you hand a colleague before they write. The difference shows when the file is wrong or incomplete. A paraplanner handed two fact-finds would ask which one stands, and one given no pension statement would ask for it. Unless the software has been built to stop and ask, the AI carries on with what it has. That is why uploading the whole folder is not the safe choice it feels like. More material gives the AI more to choose from, not a better sense of which document counts.

Not to be confused with

  • A prompt is the request typed into the AI. It is part of the context, not all of it.
  • The context window is how much the AI can take in at once. It is the size of the desk, not the file on it.
  • Memory is what some software saves from one conversation and puts into the context of a later one. Until it goes back into the context, the AI does not have it.
  • Training, in this entry, means the process that built the AI before release. It is not staff training or CPD.

Overheard

AdviserThe Marsh letter has her down as cautious. Can you change that line?

ParaplannerThe fund suggestion rests on it too. Her 2023 fact-find was still in the context, so I'll leave it out and run the draft again.

Where it sits

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Sources

Last reviewed 28 SEPT 2026

  1. Effective context engineering for AI agents ↗Anthropic · 29 SEPT 2025
  2. Knowledge Conflicts for LLMs: A Survey ↗Xu et al., arXiv · 22 JUN 2024
  3. Lost in the Middle: How Language Models Use Long Contexts ↗Liu et al., Transactions of the Association for Computational Linguistics · 20 NOV 2023

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