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AI Reasoning Panel

Collapsible thinking or reasoning section on an assistant message that opens while streaming and collapses when done.

Full screen Try a theme

Choose the primitives library your project already uses. Both look the same: your theme, not the variant, controls colors, shape, type and motion.

About this block

What it's for

  • Collapsible thinking or reasoning section on an assistant message that opens while streaming and collapses when done.
  • Show the model's chain of thought with a 'Thought for 6 seconds' label.
  • Reasoning panel for an AI chat that auto-expands during thinking and folds into a summary.

For a step-by-step run with tool calls and results, use AI Agent Run Trace.

Includes

  • Reasoning stream
  • Thinking disclosure
  • Auto open while streaming
  • Auto collapse when done
  • Thought for duration label
  • Live elapsed timer
  • Manual override
  • Stream replay

Works with

  • Radix UI and Base UI primitives (pick the one your project uses)
  • React 19 and Tailwind CSS 4 in Next.js (App Router), Vite, React Router or TanStack Start, installed with the agentic-ui or shadcn CLI
  • Your theme tokens, in light and dark mode

Install

Included with Agentic UI Kit (one-time license). Install needs your license key: see pricing · connect your project.

Agentic UI CLI
agentic-ui add ai-reasoning-panel
Installs through shadcn and adapts the component to your design tokens.
shadcn CLI
npx shadcn@4.17.0 add @agentic-ui/ai-reasoning-panel

Used in

A standalone component: drop it into any screen.

Type
Block
Variants
Radix UI and Base UI
Themes
Light and dark
Widths
Preview it at desktop, tablet and mobile widths above.