What's the difference between Flash, Max and Heavy?
Flash, Max and Heavy are three efforts of the same model, SuperCosmos 1.1. They share its weights (550B parameters, 55B active) and its 1M-token context window. They differ in how much the model thinks.
| Flash | Max | Heavy | |
|---|---|---|---|
| Speed | Fastest | Balanced | Slowest |
| Extended thinking | Off | On | On, longest |
| Best for | Everyday steps | Planning, debugging, multi-file work | Hard bugs, deep reasoning |
| Input / output per 1M | $1.60 / $3.40 | $1.80 / $3.80 | $2.00 / $4.40 |
Output prices include reasoning tokens, so Heavy usually uses more output tokens per answer. Every plan, Free included, includes all three.
Related articles
Still need help?
Tried the steps above and still stuck? Email us. We usually reply within the first hour, and always within 24 hours. A full support team is with you.
Infrastructure questions, or permanent deletion of your data
infrastructure@clatterlabs.xyzFor deleting your whole account or the data of one service.