# SuperCosmos Max

> The strong tier. Thinks before acting; built for planning, debugging and multi-file changes.

Max reasons before it acts, which makes it more reliable on work that needs a plan.

| | |
| --- | --- |
| Model id | `supercosmos-max` |
| Model | SuperCosmos: 550B parameters, 55B active per token |
| Context window | 1M tokens (1,048,576) |
| Agent API | `"tier": "max"` |
| Input | $1.80 per 1M tokens |
| Output | $3.80 per 1M tokens |
| Long context | Long-context input above 262K tokens: 1.5× |

## Good fits

- Building a feature end to end
- Debugging from logs and failing tests
- Refactors that touch several files
- Setting up projects, CI and deployments

## Move up when

The problem is genuinely hard: a subtle bug, a large build, or a task where getting it right matters more than speed. Try [Heavy](/models/heavy).