Lai setup

LattifAI Setup

LattifAI aligns captions to audio at word-level precision. Two steps to get started.

1. Install

Requires Python 3.10+. Choose either installer:

Recommended — uv (≈10–15× faster)

# One-time: install uv if you don't have it
curl -LsSf https://astral.sh/uv/install.sh | sh   # or: brew install uv / pip install uv

# Install lattifai
uv pip install lattifai --extra-index-url https://lattifai.github.io/pypi/simple/

# Workaround for a known entry-point name conflict — re-install lattifai
# last so its `lai` console script wins. Without this, `lai --version`
# may fail with "No such option: --version" (an upstream `lattifai-run`
# package also claims the `lai` script name).
uv pip install --reinstall-package lattifai lattifai \
    --extra-index-url https://lattifai.github.io/pypi/simple/

Typical end-to-end runtime on broadband: ~1 minute. uv parallelizes downloads and resolves the dependency graph in Rust; it also dedupes wheels across envs via a global cache, so subsequent installs in fresh envs are near-instant.

Standard — pip

pip install lattifai --extra-index-url https://lattifai.github.io/pypi/simple/

First pip install takes 5–15 minutes on broadband — torch (~80 MB), onnxruntime, scipy, transformers are all sizeable wheels. pip's serialized download + sequential install order happens to land on the right lai script automatically, so no workaround needed.

You may see a cosmetic WARNING: No metadata found ... Can't uninstall 'setuptools' line during install — known anaconda + pip interop quirk, safe to ignore.

2. Get a Free Trial Key — lai auth trial

For new users this is the only command you need. It claims a no-sign-up trial (2 hours of alignment credits, valid 14 days). There is no lai login command — it's lai auth trial (new user) or lai auth login (existing paid account).

lai auth trial

The output shows your credits and expiry. You're ready.

API key is user-level, not env-level. The credentials live in ~/.lattifai/config.toml and are shared across every Python / conda env on the same machine. Switching to a fresh env does not require re-authenticating; running lai auth trial in a new env on a machine that already has an active trial returns "You already have an active trial (expires …)". To rotate, run lai auth logout first.

To double-check the environment any time: lai doctor (FAIL rows include a fix suggestion).

On lai doctor warnings:

• Model cache: Stale – update needed → not actionable; the alignment models are auto-prefetched on first lai alignment / lai youtube align run. The warning lifts itself once the prefetch completes.
• Package version: outdated → run lai update to grab the latest CLI. Recommended monthly, or whenever a feature you need is in a newer release.

Common Issues

Problem	Fix
pip can't find lattifai or its dependency lattifai-core	Re-run with --extra-index-url https://lattifai.github.io/pypi/simple/ (lattifai-core ships only on the LattifAI mirror)
lai --version returns No such option: --version after uv pip install	Entry-point name conflict — lattifai-run also claims the lai script. Run uv pip install --reinstall-package lattifai lattifai --extra-index-url https://lattifai.github.io/pypi/simple/ to re-install lattifai last.
lai auth trial returns 429	Trial already used on this device — run lai auth login for a full account
API key invalid / expired (trial expires after 14 days)	lai auth logout, then lai auth trial (new device) or lai auth login (paid account)
Couldn't load entrypoint <name>: No module named 'lattifai' on lai startup	Stale editable install — pip show lattifai reveals Editable project location: /path/that/no-longer-exists. Run pip uninstall -y lattifai lattifai-core lattifai-run k2py then reinstall non-editable per Step 1
lai command runs but outputs EXPIRES_AT warning past today	Trial key expired — re-run lai auth trial (new key)
Outdated package	lai update

Related Skills

Once authenticated, jump straight to the feature you need:

• /lai-align — align audio + existing captions
• /lai-transcribe — transcribe audio/video from scratch (also covers Gemini API key setup)
• /lai-youtube — process a YouTube video end-to-end