context-editing changedbuild-with-claude/context-editing
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Lines−6removed
From line
46
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First seen
14 Aug 2026
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Recorded edits18to this page, all time
The whole hunk
from line 46, old and new numbered
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from line 46
4646<Tip>
4747 **Default behavior:** The default varies by model class.
4848
49 | Model class | Keep all prior thinking | Keep only the last turn's thinking |
50 | ---------------- | --------------------------- | ----------------------------------- |
51 | Opus | Claude Opus 4.5 and later | Claude Opus 4.1 and earlier |
52 | Sonnet | Claude Sonnet 4.6 and later | Claude Sonnet 4.5 and earlier |
53 | Haiku | (none) | All models through Claude Haiku 4.5 |
54 | Fable and Mythos | All models | (none) |
49 | Model class | Keep all prior thinking | Keep only the last turn's thinking |
50 | ---------------- | --------------------------- | ------------------------------------------ |
51 | Opus | Claude Opus 4.5 and later | Claude Opus 4.1 and earlier |
52 | Sonnet | Claude Sonnet 4.6 and later | Claude Sonnet 4.5 (deprecated) and earlier |
53 | Haiku | (none) | All models through Claude Haiku 4.5 |
54 | Fable and Mythos | All models | (none) |
5555
5656 Use this strategy to override the default. If your code runs across multiple model tiers, set `keep` explicitly rather than relying on the per-model default.
5757</Tip>
No line in this hunk matches that.