> ## Documentation Index
> Fetch the complete documentation index at: https://docs.auriko.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# model_not_found

> HTTP 404 — Requested model ID isn't in the catalog.

## HTTP status

`404 not_found_error`

## Typical cause

The `model` parameter references a model that doesn't exist in Auriko's canonical catalog, or the requested provider variant is not available.

## Model ID format

Auriko resolves `model` by exact match, so the value must be:

* **A bare canonical ID** — for example `gpt-4o-mini-2024-07-18`, not a vendor-prefixed form like `openai/gpt-4o-mini`.
* **Case-sensitive** — `GPT-4o-mini-2024-07-18` does not match `gpt-4o-mini-2024-07-18`.

Many models also accept a shorter **alias** (for example `claude-opus-4-5`, which resolves to `claude-opus-4-5-20251101`). Each model's aliases are listed in its [directory entry](https://api.auriko.ai/v1/directory/models).

## Resolution

Check the model ID against the [models directory](https://api.auriko.ai/v1/directory/models) and retry with a valid model ID.