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AI Handbook

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AI Handbook

AI tools, explained by doing

Every page here answers one question: how do I actually do this. No release notes, no hot takes — the tool, the steps, the command, and what it costs.

Browse tools and models

9 published pagesTools & models 2News 3Tutorials 3Deep dives 1

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Latest additions

New pages land here first, then in the section lists.

Update

HackerTube

HackerTube is a video site that only shows clips Hacker News readers have linked to in comments. It indexes 6,454 videos drawn from 39,834 HN comments since 2007, built by Andrej Karpathy, and it reached the top of Hacker News within hours of launch.

  • hackertube
  • karpathy
Update

Sticker Banners on TikTok

Sticker banners are having a moment. Search interest climbed roughly eightfold over the past thirty days, driven almost entirely by TikTok, where creators are building decorative banners out of layered stickers and filming the process.

  • trend
  • diy
Tutorial

Ghostface Voice Changer

No Ghostface voice changer device exists — the voice is Roger L. Jackson's performance. Three real routes approximate it: AI voice tools, real-time desktop changers with a phone filter, and costume prop kits.

  • voice
  • audio
Deep dive

Opus 5.5 Is Not 40% Cheaper Everywhere. Here Is Where the Number Holds.

Anthropic's headline for Claude Opus 5.5 is simple: 40% cheaper, 30% faster than Opus 5. Those two numbers are doing most of the work in every comparison article published since September.

    Tool

    Concat Video Editor

    Concat is a free, open-source video editor positioned as a direct CapCut replacement. It runs on Windows, macOS, Linux, Android, and iOS, ships under AGPL-3.0 (per its repository), and imposes no watermarks, no export limits, and no paywall.

    AGPL-3.0

    • tool
    • open-source

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    Four ways in

    Tools & models

    One card per tool or open model: what it does, what it costs, how to start.

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    News

    What just changed, whether it matters, and where to read the permanent guide.

    All 3 →

    Tutorials

    Workflows you can reproduce, with the exact commands and settings.

    All 3 →

    Deep dives

    The longer argument behind the guides.

    All 1 →

    Frequently asked questions

    Is everything on the site free?

    Yes. Every entry, tutorial and update is readable without an account, and there is no metered paywall or cookie wall. A membership is planned for the longer research pieces, but the reference pages stay open.

    How often are pages updated?

    Entries are re-checked roughly once a quarter and immediately when a product changes its pricing or drops a free tier. When that happens the page is corrected and the date at the top moves; the URL never changes.

    Do you take payment for reviews or rankings?

    No. No company has reviewed a draft about itself, and no payment changes what appears here or where it appears. Where an outbound link is an affiliate link, it is labelled as one next to the button.

    Are the numbers on the page measured or quoted?

    Measured numbers are labelled as ours and carry the hardware or connection they were taken on. Anything from a vendor benchmark or a third-party report is marked as reported in the sentence itself, not in a footnote.

    Do you cover every new AI tool?

    No. A page exists when there is something useful to add: a working install path, a measured limit, or a clear answer to what it replaces. Tools we have not used do not get a page just because they launched.