fix(stats): hide Union Alpha provider (#49355)

Co-authored-by: adamdotdevin <2363879+adamdotdevin@users.noreply.github.com>

packages/stats/core/src/domain/inference.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, test } from "bun:test"
-import { toGeoAggregate, toModelAggregate, toProviderAggregate } from "./inference"
+import { buildStatsQuery, toGeoAggregate, toModelAggregate, toProviderAggregate } from "./inference"
 import { modelAuthor, normalizeInferenceModel, statModel, statProvider } from "./model-normalization"
 
 describe("inference stat normalization", () => {
@@ -38,6 +38,22 @@ describe("inference stat normalization", () => {
     expect(statProvider("unknown", "", "custom-provider")).toBe("custom-provider")
   })
 
+  test("merges union alpha routes without exposing the provider", () => {
+    ;["opencode-go/union-alpha", "opencode/union-alpha"].forEach((model) => {
+      expect(statModel(model, "")).toBe("union-alpha")
+      expect(statProvider(model, "gpt-test-model", "test-provider")).toBe("unknown")
+      expect(
+        toModelAggregate({ ...aggregate(model, "test-provider"), provider_model: "gpt-test-model" }),
+      ).toMatchObject([{ model: "union-alpha", provider: "unknown", requests: 1 }])
+      expect(toProviderAggregate(aggregate(model, "test-provider"))).toMatchObject([
+        { provider: "unknown", requests: 1 },
+      ])
+      expect(toGeoAggregate({ ...aggregate(model, "test-provider"), country: "US" })).toMatchObject([
+        { model: "union-alpha", provider: "unknown", country: "US", requests: 1 },
+      ])
+    })
+  })
+
   test("merges renamed models under their current name", () => {
     expect(statModel("deepseek-flash", "")).toBe("deepseek-v4.1-flash")
     expect(statModel("x-preview-f", "")).toBe("ox-alpha")
@@ -94,6 +110,20 @@ describe("inference stat normalization", () => {
       }),
     ).toMatchObject([{ period_key: "2026-W20" }])
   })
+
+  test("normalizes union alpha routes in stat queries", () => {
+    process.env.SST_RESOURCE_InferenceEvent = JSON.stringify({
+      catalog: "inference",
+      database: "events",
+      table: "generation",
+    })
+    process.env.SST_RESOURCE_StatsSyncConfig = JSON.stringify({ dataset: "zen" })
+    const query = buildStatsQuery(new Date("2026-05-20T00:00:00.000Z"), new Date("2026-05-21T00:00:00.000Z"))
+
+    expect(query).toContain("WHEN lower(model) = 'opencode-go/union-alpha' THEN 'union-alpha'")
+    expect(query).toContain("WHEN lower(model) = 'opencode/union-alpha' THEN 'union-alpha'")
+    expect(query).toContain("WHEN lower(model) IN ('omen-alpha', 'union-alpha') THEN 'unknown'")
+  })
 })
 
 function aggregate(model: string, provider: string) {

packages/stats/core/src/domain/inference.ts

@@ -7,6 +7,7 @@ import {
   MODEL_AUTHOR_RULES,
   MODEL_NAME_ALIASES,
   RETIRED_STAT_PROVIDERS,
+  STEALTH_MODELS,
   statModel,
   statProvider,
 } from "./model-normalization"
@@ -263,6 +264,7 @@ ${Object.entries(MODEL_NAME_ALIASES)
 
 function statProviderSql(model: string, providerModel: string, provider: string) {
   return `CASE
+      WHEN lower(${model}) IN (${[...STEALTH_MODELS].map(sqlString).join(", ")}) THEN 'unknown'
 ${MODEL_AUTHOR_RULES.map((item) => `      WHEN strpos(lower(${providerModel}), ${sqlString(item.match)}) > 0 THEN ${sqlString(item.author)}`).join("\n")}
 ${MODEL_AUTHOR_RULES.map((item) => `      WHEN strpos(lower(${model}), ${sqlString(item.match)}) > 0 THEN ${sqlString(item.author)}`).join("\n")}
       WHEN ${provider} <> '' AND lower(${provider}) NOT IN (${RETIRED_STAT_PROVIDERS.map(sqlString).join(", ")}) THEN ${provider}

packages/stats/core/src/domain/model-normalization.ts

@@ -13,8 +13,11 @@ export const MODEL_AUTHOR_RULES = [
   { match: "qwen", author: "qwen" },
 ] as const
 export const EXCLUDED_MODELS = new Set(["alpha-gpt-next"])
+export const STEALTH_MODELS = new Set(["omen-alpha", "union-alpha"])
 export const MODEL_NAME_ALIASES: Record<string, string> = {
   "deepseek-flash": "deepseek-v4.1-flash",
+  "opencode-go/union-alpha": "union-alpha",
+  "opencode/union-alpha": "union-alpha",
   "x-preview-f": "ox-alpha",
   "xiaomi/mimo-v2.5": "mimo-v2.5",
 }
@@ -45,7 +48,10 @@ export function statProvider(
   providerModel: string | undefined,
   provider: string | undefined,
 ) {
-  const modelAuthorValue = modelAuthor(statModel(model, providerModel))
+  const normalized = statModel(model, providerModel)
+  if (STEALTH_MODELS.has(normalized.toLowerCase())) return "unknown"
+
+  const modelAuthorValue = modelAuthor(normalized)
   if (!modelAuthorValue) return undefined
 
   const providerModelAuthor = modelAuthor(providerModel)