O4 O4.8
Live · Non-profit Free forever / 2026

Powerful AI.
Actually free.

O4.8 is a non-profit chat front-end for Claude Opus 4.8 and friends. Every account gets 5,000 credits a month, free. No paid plan, no upsell, no catch — sign in and talk.

5,000credits / month
$0forever
3models live
Non-profitby design
§ 01 — The Models

Pick your brain.

Claude Opus 4.8

The heavyweight. Best for hard reasoning, code, and long writing.

25 credits / msg

Claude Sonnet 4.6

Balanced and quick. A great everyday default.

10 credits / msg

Claude Haiku 4.5

Fast and light. The cheapest way to keep chatting.

3 credits / msg

Fable-5

A new model joining the roster.

Coming soon
§ 02 — How it works

Three steps.

1 · Create a free account

Email, name, a username. You get an auto-generated user ID and personal key.

2 · Open the chat & pick a model

Heavier model, more credits. Lighter model, fewer. Switch anytime.

3 · Spend up to 5,000 / month

It refills automatically every month. That's the whole deal.