AI CSS Animations

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Next Token Sampling Bars

Five candidate next tokens grow into probability bars, the sampled one flashes and its word arcs down into the sentence at the caret, then the chart re-forms for the next position.

Also known as: next token probability animation, llm sampling visualization, token probability bars, how streaming works animation.

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Everything you see above is live. Basic and Pro include every premium piece, with the HTML and CSS ready to copy, plus the Tailwind version where there is one and Motions in Claude Code on Pro.

Customizing this snippet

  • Color: set --aia-color on the element or a parent. Currently previewing #3b82f6.
  • Base size: set --aia-size. Every other dimension is in em, so the whole thing scales together. Currently previewing 16px.
  • Speed: change the duration on the transition or animation shorthand. Staggered delays are relative, so they keep their rhythm.
  • Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.

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