LowRouter

Available models

The full catalogue lives on the model browser. It’s generated from the same data the API exposes at GET /models, so the two agree by construction.

How model IDs are formed

Text
<provider>/<model>

Examples:

  • openai/gpt-4o-mini
  • anthropic/claude-sonnet-4-5
  • mistral/mistral-large-latest

The <provider> segment matches the id of an entry in GET /providers; the <model> segment is the upstream model name.

What each model card shows

  • Display name — the human-readable name, sometimes versioned.
  • Provider and owner — who serves it and who created it (these differ for re-hosted models, e.g. Llama on Mistral).
  • Context window — max input tokens.
  • Pricing — prompt, completion, and (where applicable) cached prompt rates per 1K tokens, in your account currency.
  • Capabilitiestool_use, vision, structured_output, streaming. Filter the catalogue by these.
  • Eco data — active parameter count and the energy estimate per 1K tokens. Both numbers come from the methodology. The confidence band (accurate, medium, gross) reflects how well-sourced the parameter count is.
  • Regions — where the upstream serves it (eu-west, us-east, …).

Pseudo-models

Two model strings are not actual models but routing primitives:

  • lowrouter/auto — pick a model based on the request and the current routing policy. See routing.
  • lowrouter/auto-cheap — auto-route biased toward the cheapest model that can plausibly handle the request. Useful for high-volume, low-importance work (classification, simple summaries).

When a pseudo-model is used, the response’s model field is the resolved model.

Lifecycle

  • Added. When an upstream releases a new model and we integrate it, it appears on the model browser. Brand-new models start with a medium or gross eco confidence band until the parameter count is verified.
  • Deprecated. When an upstream announces deprecation, the model card flags it with a deprecated badge and a sunset date. Routing still uses it until the sunset date.
  • Removed. After the sunset date, requests for the model return model_deprecated. A migration suggestion is included in the error body when we have one.

Filtering the catalogue

The model browser supports filtering by:

  • Provider
  • Context window
  • Capability flags
  • Eco confidence band
  • Price range

The same filters are reflected in GET /models query parameters; see the discovery endpoints.