What does 410 model_retired mean?

You called a Line Code id. Line Code was retired on Nov 1, 2026, and its ids answer 410. They are never billed and never routed to another model.

Code: model_retired · HTTP status: 410

The body includes "replacement": "supercosmos" and "retired_at": "2026-11-01".

Common causes#

• line-code, line-code-fast, line-code-ultra or line-code-ultra-fast in your code

How to fix it#

1. Use supercosmos-flash instead of line-code-fast.
2. Use supercosmos-max instead of line-code-ultra.
3. Use supercosmos-heavy instead of line-code-ultra-fast.

Should my code retry?#

Never retry: the ids won't come back.

The error body uses the OpenAI shape, so OpenAI SDKs raise it as an exception you can catch:

{"error": {"message": "...", "type": "...", "code": "model_retired", "param": null}}

Every response also carries an X-Request-Id. Keep it in your logs; it's the quickest way for support to find a request.

The full 410 response#

{
  "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"
  }
}

The family id line-code answers the same way, and GET /v1/models/line-code-fast (or any Line Code id) answers 410 too. Read why in Why was Line Code retired?.

See the full list in the Model API reference.

Still need help?#

• General support: support@clatterlabs.com or team@clatterlabs.xyz
• Infrastructure questions, or permanent deletion of your data (your whole account or one service): infrastructure@clatterlabs.xyz

We usually reply within the first hour, and always within 24 hours. A full support team is with you.