Context windows

Learn in five minutes

• The context window is how much text the call can see at once.
• Instructions, notes, and the growing reply all spend that budget.
• Overflow is a cut, not a memory.
• Published window sizes change. Confirm the model card.
• A long paste is not a retrieval system.

Put the instruction after a long note and the model may never reach it if the note was truncated. Say what you dropped.

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Visual

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A toy budget of 100 units

1. Give the instruction 20 toy units and the note 90.
2. The sum is over 100, so something is cut.
3. Write down which part you kept. Do not call the cut a memory.

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Quiz

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Ecosystem

Context window

The maximum text one model call considers.

Sisters: Tokenizers, Transformers, Decoding, Model cards.

The same next-token idea sits under chat, voice, and tool calls.

Pin a model id when you leave the toy explanations.

Config

• Write the goal in one sentence.
• Name the input and the allowed output.
• Save the trace next to the result.

Troubleshooting

• The answer looks fluent and is wrong. Check whether a source passage actually contains the claim.
• The loop never stops. Set a step cap and stop when the tool result repeats.

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