# Claude Opus's fast mode

til · 2026-05-28

import HLSVideo from '@components/content/HLSVideo.astro';
import PiExtensionLink from '@components/content/PiExtensionLink.astro';

Missed that claude/opus has a fast mode so I had Pi make a quick extension[^1] to play with it. Below, a comparison with the vanilla Opus.

<HLSVideo slug="claude-opus-fast-mode" assetPath="blog/claude-opus-fast-mode/videos/claude-opus-fast-mode" alt="Comparison between of Claude Opus 4.8 in regular mode and in Fast mode ">
  Comparison between of Claude Opus 4.8 in regular mode and in Fast mode
</HLSVideo>

<PiExtensionLink href="https://gist.github.com/aliou/b7fe59004e023691c2e75c8458f3c0a8" />

[^1]: Don't look too closely at that horrendous code that Kimi with reasoning disabled produced.