GPT 5.6 Sol vs Kimi K3 vs Fable 5

Which model should you use?

You open a new chat and stop.

Which one do I use for this?

Five threads this week named five different winners, and they’re all correct - each one read a different leaderboard.

So you default to the most expensive option, because expensive feels safe.

It isn’t.

Here’s the honest comparison which helps you to fix this.

By the end of this issue, you will get The Complete Three-Model Guide plus The One-Page Cheatsheet - a single printable sheet you can pin above your desk and stop guessing.

THE AI VAULT IS OPEN

Every guide, kit, template, and prompt library I’ve built - in one place. Organized. Searchable. Growing every week. Here’s how access works:

Paid Members: Get one specific guide related to the newsletter from the Vault every issue. Yours for a week.

Founding Members: Full access to everything inside the Vault. Every guide. Every kit. Every drop. Forever.

We’re 2-3 months away from 10K+ subscribers. The moment we hit that number, we’re launching a private free community - exclusively for AI In Public readers.