Pinull
Join the beta

Private beta

AI that refuses
to invent.

Pinull writes Python and proves every line against the real interpreter. Nothing invented reaches you.

We use your email only to invite you and tell you about Pinull. Privacy

You're on the list.We'll write when your invitation is ready.

One click helps us invite the right people first. What do you do?

Free for early members.

Real AI code behind. Real Pinull verdicts in the lens.

The problem

It looks perfect.
That's the problem.

AI writes calls and imports that never existed — with total confidence.

refuted module 'pathlib' has no attribute or submodule 'pathlib_module' — Pinull

Real AI code. Caught by Pinull before anyone ran it.

How it works

Every line has to prove itself.

A real run, replayed · gemini-3.5-flash-lite · CPython 3.13

Proof

Measured,
not promised.

323 invented names, planted in real Python code. Not one was passed as real.

0passed as real

  • 267 refuted, with the reason
  • 54 flagged as unproven
  • 2 safely guarded in the code

Each square is one invented name.

0.158

false alarms per 1,000 references in Python's standard library

858

automated tests, each tied to a promise

Real bugs it found in software everyone uses.

Filed by us. Confirmed by their maintainers.

Private beta

Be among the first.

  • Early accessInvitations go out in small waves.
  • Free for early membersNo card. No trial clock.
  • You shape itYour feedback decides what comes next.
  • Human supportTalk to the people who build it.

We use your email only to invite you and tell you about Pinull. Privacy

You're on the list.We'll write when your invitation is ready.

One click helps us invite the right people first. What do you do?

Python today. More languages later.

Questions

Questions.

What is Pinull?

An AI coding assistant that checks its own work. A model writes Python; Pinull checks every import, name, attribute and call against the real interpreter, then the types, the data flow, and tests written from the plan you approved. If something can't be proven, you get the reason instead of the code.

Does my code leave my computer?

Pinull runs on your machine. Your code never reaches Krydia. When Pinull asks a model to write code, it uses your own model account and key.

Which AI models and tools does it work with?

Any model behind an OpenAI-compatible API — we use Gemini, Mistral and open models on Groq every day. Pinull also works inside Claude Code, Claude Desktop, Cursor and VS Code, and from the command line.

Which languages?

Python, done properly, first. Other languages will follow.

How much will it cost?

It's free for early members. We'll announce pricing before it matters to anyone.

When can I use it?

We're sending invitations in waves. Leave your email and you'll hear from us.

Who makes Pinull?

Krydia, a team in Azerbaijan. Wisdom and Wonder.

Your turn

Can you spot what
the AI made up?

Real answers from real AI models. In each, one highlighted name won't work.