fix(free-models): stop reporting discontinued Pollinations models as free

The shared isFreeModel() predicate ignored each catalog entry's
freeType, so Pollinations models marked "discontinued" (moved behind a
paid key) were still reported free and could be routed under
hidePaidModels.

Add a compiler-checked grantsFreeAccess(freeType) table and use it in
both the routing predicate and strictZeroCostFilter.

Tests: tests/unit/autoCombo/free-regime-not-read-by-predicate.test.ts

changelog.d/fixes/11441-discontinued-free-models.md

@@ -0,0 +1 @@
+- **fix(free-models):** the shared `isFreeModel()` predicate no longer reports catalog entries marked `freeType: "discontinued"` as free, so `hidePaidModels` can't route to Pollinations' seven premium models that now require a paid key ([#11441](https://github.com/diegosouzapw/OmniRoute/pull/11441))

open-sse/config/freeModelCatalog.ts

@@ -69,6 +69,31 @@ export interface FreeModelTotals {
 
 const RECURRING = new Set<FreeModelFreeType>(["recurring-daily", "recurring-monthly", "keyless"]);
 
+/**
+ * What each free-tier regime engages for "can I route here without paying?".
+ * Exhaustive by construction: adding a member to `FreeModelFreeType` will not
+ * compile until it is classified here. `discontinued` is the one regime a
+ * provider uses to retire a free tier behind a paid key — it does NOT grant
+ * free access, and the shared predicate (`isFreeModel`) must read this instead
+ * of treating every catalogued id as free. `RECURRING` (above) answers a
+ * different question (which regimes feed the headline token totals) and is left
+ * independent on purpose — deriving it from this table would silently change
+ * the homepage totals.
+ */
+const FREE_REGIME_TRAITS = {
+  "recurring-daily": { grantsFreeAccess: true },
+  "recurring-monthly": { grantsFreeAccess: true },
+  "recurring-credit": { grantsFreeAccess: true },
+  "recurring-uncapped": { grantsFreeAccess: true },
+  "one-time-initial": { grantsFreeAccess: true },
+  keyless: { grantsFreeAccess: true },
+  discontinued: { grantsFreeAccess: false },
+} satisfies Record<FreeModelFreeType, { grantsFreeAccess: boolean }>;
+
+export function grantsFreeAccess(freeType: FreeModelFreeType): boolean {
+  return FREE_REGIME_TRAITS[freeType].grantsFreeAccess;
+}
+
 /**
  * Deposit-unlock boosts: a one-time small top-up that permanently raises a
  * provider's recurring free quota. Kept OUT of the steady headline and surfaced

open-sse/services/autoCombo/strictZeroCostFilter.ts

@@ -50,6 +50,7 @@
  */
 import {
   FREE_MODEL_BUDGETS,
+  grantsFreeAccess,
   type FreeModelBudget,
 } from "@omniroute/open-sse/config/freeModelCatalog.ts";
 import { SYNTHETIC_NOAUTH_CONNECTION_ID } from "./resilienceCandidateFilter";
@@ -184,7 +185,7 @@ export function evaluateCandidateConnections(
     // entries today, so it will correctly exclude).
     if (isGenuineNoAuthCandidate) return [SYNTHETIC_NOAUTH_CONNECTION_ID];
   }
-  if (budgetEntry.freeType === "discontinued") return [];
+  if (!grantsFreeAccess(budgetEntry.freeType)) return [];
   if (isGenuineNoAuthCandidate) return []; // no-auth path but a non-keyless catalog entry: contradictory metadata, fail closed
 
   // Every remaining freeType (recurring-*, one-time-initial, a keyless entry

src/shared/utils/freeModels.ts

@@ -1,4 +1,4 @@
-import { FREE_MODEL_BUDGETS } from "@omniroute/open-sse/config/freeModelCatalog";
+import { FREE_MODEL_BUDGETS, grantsFreeAccess } from "@omniroute/open-sse/config/freeModelCatalog";
 import { resolveProviderId } from "@/shared/constants/providers";
 import { globToRegex } from "@/shared/utils/globPattern";
 import { AI_MODELS } from "@/shared/constants/models";
@@ -12,16 +12,25 @@ import { AI_MODELS } from "@/shared/constants/models";
  * considered free when its id carries the OpenRouter-style `:free` suffix, when
  * both its prompt and completion prices are zero, or when its id is listed as a
  * free model for that provider in the catalog.
+ *
+ * The catalog also records the regime of every entry via `freeType`
+ * (`FreeModelFreeType`). A regime can retire a free tier behind a paid key
+ * (`discontinued`); `grantsFreeAccess` is the single predicate that decides
+ * whether a regime still grants free access, and the two structures below are
+ * derived only from entries whose regime grants it — so a `discontinued` entry
+ * is never reported free, and a future regime that forgets to be classified
+ * fails to compile rather than defaulting silently.
  */
 
+/** Catalogued entries whose regime still grants free access. */
+const FREE_BUDGETS = FREE_MODEL_BUDGETS.filter((m) => grantsFreeAccess(m.freeType));
+
 /** Provider ids that have at least one documented free model. */
-export const PROVIDERS_WITH_FREE_MODELS: Set<string> = new Set(
-  FREE_MODEL_BUDGETS.map((m) => m.provider)
-);
+export const PROVIDERS_WITH_FREE_MODELS: Set<string> = new Set(FREE_BUDGETS.map((m) => m.provider));
 
 const FREE_MODEL_IDS_BY_PROVIDER: Map<string, Set<string>> = (() => {
   const map = new Map<string, Set<string>>();
-  for (const m of FREE_MODEL_BUDGETS) {
+  for (const m of FREE_BUDGETS) {
     let set = map.get(m.provider);
     if (!set) {
       set = new Set<string>();

tests/unit/autoCombo/free-regime-not-read-by-predicate.test.ts

@@ -0,0 +1,141 @@
+/**
+ * Follow-up to #6328 / #6495 / #6512 — the shared free-model predicate ignored
+ * the catalog's own `freeType`, so entries a provider has since put behind a
+ * paid key were still reported free.
+ *
+ * The catalog already records the regime of every entry, and
+ * `strictZeroCostFilter` already reads it. These guards pin the same rule into
+ * the predicate that `hidePaidModels` and `/v1/models` go through.
+ */
+import { test } from "vitest";
+import assert from "node:assert/strict";
+
+import {
+  FREE_MODEL_BUDGETS,
+  grantsFreeAccess,
+  type FreeModelFreeType,
+} from "../../../open-sse/config/freeModelCatalog.ts";
+import { isFreeModel, providerHasFreeModels } from "../../../src/shared/utils/freeModels.ts";
+import { filterPaidOnlyCandidates } from "../../../open-sse/services/autoCombo/paidModelFilter.ts";
+import {
+  evaluateCandidateConnections,
+  findBudgetEntry,
+} from "../../../open-sse/services/autoCombo/strictZeroCostFilter.ts";
+
+/** Catalogued under `pollinations` as `discontinued`: the provider moved them
+ * behind an API key, and their `displayName` says so. */
+const DISCONTINUED = [
+  "gemini",
+  "gemini-fast",
+  "midijourney",
+  "midijourney-large",
+  "claude-fast",
+  "claude",
+  "claude-large",
+];
+
+/** Same provider, still keyless — the guard against over-filtering. */
+const STILL_FREE = ["openai", "openai-fast", "qwen-coder", "mistral", "deepseek"];
+
+test("a model the catalog marks discontinued is not free", () => {
+  for (const id of DISCONTINUED) {
+    assert.equal(
+      isFreeModel("pollinations", { id }),
+      false,
+      `pollinations/${id} is catalogued discontinued and must not qualify as free`
+    );
+  }
+});
+
+test("the provider's still-free models are untouched", () => {
+  for (const id of STILL_FREE) {
+    assert.equal(
+      isFreeModel("pollinations", { id }),
+      true,
+      `pollinations/${id} is catalogued keyless and must stay free`
+    );
+  }
+});
+
+test("the provider itself still counts as having free models", () => {
+  assert.equal(
+    providerHasFreeModels("pollinations"),
+    true,
+    "pollinations keeps ten keyless entries; only the discontinued ones change"
+  );
+});
+
+test("hidePaidModels drops them from the auto/* candidate pool", () => {
+  const discontinued = { provider: "pollinations", model: "claude" };
+  const stillFree = { provider: "pollinations", model: "openai" };
+
+  assert.deepEqual(
+    filterPaidOnlyCandidates([discontinued, stillFree], true),
+    [stillFree],
+    "an operator who asked not to route to paid models must not get one that needs a paid key"
+  );
+  assert.deepEqual(
+    filterPaidOnlyCandidates([discontinued, stillFree], false),
+    [discontinued, stillFree],
+    "opt-in off stays an identity no-op"
+  );
+});
+
+test("no provider loses its free status", () => {
+  const withFreeRegime = new Set(
+    FREE_MODEL_BUDGETS.filter((m) => grantsFreeAccess(m.freeType)).map((m) => m.provider)
+  );
+  const lost = [...new Set(FREE_MODEL_BUDGETS.map((m) => m.provider))].filter(
+    (p) => !withFreeRegime.has(p)
+  );
+  assert.deepEqual(
+    lost,
+    [],
+    "no catalogued provider is discontinued across the board today; if one ever is, decide deliberately"
+  );
+});
+
+test("every regime is classified, with the expected verdict", () => {
+  const expected: Record<FreeModelFreeType, boolean> = {
+    "recurring-daily": true,
+    "recurring-monthly": true,
+    "recurring-credit": true,
+    "recurring-uncapped": true,
+    "one-time-initial": true,
+    keyless: true,
+    discontinued: false,
+  };
+  for (const [freeType, verdict] of Object.entries(expected)) {
+    assert.equal(
+      grantsFreeAccess(freeType as FreeModelFreeType),
+      verdict,
+      `${freeType} must be classified ${verdict}`
+    );
+  }
+});
+
+test("the strict filter (G1c) excludes a discontinued entry, matching its prior literal", () => {
+  const budgetEntry = findBudgetEntry({ provider: "pollinations", model: "claude" });
+  assert.ok(budgetEntry, "discontinued pollinations/claude must be in the catalog");
+  assert.equal(budgetEntry.freeType, "discontinued", "sanity: the entry this guard protects");
+
+  // A discontinued entry must be excluded by the strict filter regardless of
+  // connection safety — it collapses the regime to "no free access" before any
+  // quota lookup, exactly as the previous `freeType === "discontinued"` literal did.
+  const excluded = evaluateCandidateConnections(
+    { provider: "pollinations", model: "claude", connectionId: "some-real-conn" },
+    budgetEntry,
+    () => ({
+      status: "SAFE",
+      remainingFreeAllowance: 1000,
+      resetAt: null,
+      checkedAt: new Date().toISOString(),
+    }),
+    { minRemainingAllowance: 0, maxStateAgeMs: 1e9 }
+  );
+  assert.deepEqual(
+    excluded,
+    [],
+    "a discontinued entry is excluded by the strict filter, independent of connection safety"
+  );
+});