What is SuperCosmos, the model behind Line CLI?

SuperCosmos by Clatter Labs is the model family behind Line CLI and every other Clatter Labs product. Line runs on SuperCosmos 1.1 (released Nov 2, 2026).

Key facts#

• 550B-parameter mixture-of-experts model, 55B active per token.
• 1M-token context window (1,048,576 tokens).
• Reads text only (no image input).
• Three efforts that share the same weights and window:
  • Flash (fast): quick edits and tool loops.
  • Max (strong): planning, debugging, multi-file changes; thinks before acting.
  • Heavy (deliberate): hard bugs and long reasoning; thinks longest.
• Auto lets Line choose the effort per step.

Pick with /model and /effort. See SuperCosmos models.