Line Code retirement - Clatter Labs Docs

Line Code was retired on Nov 1, 2026. Use SuperCosmos 1.1 instead: supercosmos-flash, supercosmos-max or supercosmos-heavy.

Line Code, Clatter Labs' earlier coding model, is no longer available on any Clatter Labs product. Read why in Retiring Line Code, and what comes next.

What changes for you

Where	What happens	What to do
Line CLI	Moves to SuperCosmos automatically. A saved Line Code model or effort now runs on SuperCosmos.	Nothing. Pick an effort with `/effort` if you like.
Model API	`line-code-fast`, `line-code-ultra`, `line-code-ultra-fast` and the family id `line-code` answer `410 model_retired`. They are never billed and never routed to another model.	Change the model id to `supercosmos-flash`, `supercosmos-max` or `supercosmos-heavy`.
Credits and plans	Unchanged. Your balance belongs to your account, not to a model.	Nothing.

Which SuperCosmos effort to use

If you used	Try
`line-code-fast`	`supercosmos-flash`
`line-code-ultra`	`supercosmos-max`
`line-code-ultra-fast`	`supercosmos-heavy`

See SuperCosmos models for what each effort does and costs.

The 410 response

JSON

{
  "error": {
    "message": "Line Code was retired on Nov 1, 2026. Use SuperCosmos instead: supercosmos-flash, supercosmos-max or supercosmos-heavy (in Line CLI: /model supercosmos). See https://www.clatterlabs.com/blog/retiring-line-code-and-what-comes-next",
    "type": "invalid_request_error",
    "code": "model_retired",
    "param": "model",
    "replacement": "supercosmos",
    "retired_at": "2026-11-01"
  }
}

GET /v1/models lists only SuperCosmos, plus a retired entry for Line Code with its ids and replacement.