OpenModel 0.1: what a model costs, from the provider that bills you

There is no shortage of places to look up an AI model and nowhere to look
up what it costs you, from the provider that will bill you, in a form a
program can read. Every provider publishes prices as a marketing page and
every comparison site scrapes those pages. The best of them, models.dev,
is a community database: 8,179 provider offerings across 223 providers,
maintained by volunteers reading pricing pages. Good work, and still a
third party writing down what a company charges.

OpenModel is that table served by its author at
/.well-known/openmodel.json: price per million tokens in, out and cached,
context and output limits, modalities, and what each model can do.

The unit is the offering, a provider and a model together, because the
same model reaches a buyer from many providers at many prices and the
price is the question they came with.

Two rules decide what a row means, and both come from measuring the real
data. A published zero is a fact: of those 8,179 offerings, 638 cost
nothing and 424 published no price at all, so a reader that collapses the
two invents a free model or hides one. And absent is unstated, never
false, because a false travels further than a blank and comes back quoted
as a fact.

Origin is the proof, as with every catalog spec here: a file naming a
provider's web and served by somebody else is a stranger's claim about
that company's prices.

The first reader is the models collection at nichedb.dev/c/models, which
reads descriptors beside the models.dev catalogue in the same vocabulary
so one feed catches both.

Registered in the one registry, with docs/openmodel.md and a docs-only
entry (no landing page yet), and added to the spec-discovery contract so
the family page, docs index, llms feeds and sitemap are proven to carry
it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

apps/logicsrc-web/contract/spec-discovery.contract.test.ts

@@ -14,6 +14,7 @@ describe.each([
   { slug: "openabtest", name: "OpenABTest", family: "process" },
   { slug: "openfleet", name: "OpenFleet", family: "process" },
   { slug: "openrental", name: "OpenRental", family: "catalogs" },
+  { slug: "openmodel", name: "OpenModel", family: "catalogs" },
   { slug: "openwall", name: "OpenWall", family: "people" },
   { slug: "openobject", name: "OpenObject", family: "catalogs" },
   { slug: "openslice", name: "OpenSlice", family: "catalogs" },