token-counting changedbuild-with-claude/token-counting
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779779<Note>
780780 See [Thinking and the context window](https://platform.claude.com/docs/en/build-with-claude/thinking#thinking-and-the-context-window) for more details.
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782 * Thinking blocks from **previous** assistant turns are ignored and **do not** count toward your input tokens
782 * Thinking blocks from **previous** assistant turns count toward your input tokens on models that [keep all prior turns](https://platform.claude.com/docs/en/build-with-claude/thinking#thinking-block-preservation-by-model); on models that keep only the last turn, the API strips them and they do **not** count
783783 * **Current** assistant turn thinking **does** count toward your input tokens
784784</Note>
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