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1•11/02/2026, 10:25•1 min read

ultrathink returns to Claude Code CLI

Executive TL;DR30s read

Claude Code has brought back the ultrathink command, allowing users to increase reasoning depth during the current turn when a task turns out to be more complex than expected.

ultrathink returns to Claude Code CLI

The feature was previously disabled because it seemed unusual and could confuse users.

Developers have now decided to bring it back. If a task turns out to be more complex than you expected, simply enter ultrathink while Claude is still working. This raises the reasoning level until the end of the current turn.

Why it matters

Analysis

The return of ultrathink gives developers a quick way to deepen analysis and planning in Claude Code without restarting the session.

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