diff --git a/open-sse/providers/capabilities.js b/open-sse/providers/capabilities.js
index 93486760..dd61b3e2 100644
--- a/open-sse/providers/capabilities.js
+++ b/open-sse/providers/capabilities.js
@@ -425,21 +425,29 @@ export const PATTERN_CAPABILITIES = [
  *
  * @param {string[]} comboModels
  * @param {Object|null} [comboLookup] optional map of combo name → models array for nested resolution
+ * @param {Function|null} [resolveCaps] optional (fullId) → caps override. The synced model
+ *   catalog is server-only (it reads a file), so a browser-side resolution cannot see the
+ *   limits it supplies and silently falls back to the generic patterns below. Callers that
+ *   have the server's answer (/api/models, via useModelCaps) pass it here; it is merged over
+ *   the local tables, so fields it does not carry (tools, pdf, audio/video, thinking*) survive.
  * @param {number} [_depth] internal recursion depth guard
  * @returns {object|null} full capabilities object, or null for empty input
  */
-export function aggregateComboCapabilities(comboModels, comboLookup = null, _depth = 0) {
+export function aggregateComboCapabilities(comboModels, comboLookup = null, resolveCaps = null, _depth = 0) {
   if (!comboModels?.length || _depth > 6) return null;
   const allCaps = comboModels.map((fullId) => {
     // Nested combo: bare name (no slash) that exists in the lookup — recurse
     if (!fullId.includes("/") && comboLookup?.[fullId]) {
-      return aggregateComboCapabilities(comboLookup[fullId], comboLookup, _depth + 1)
+      return aggregateComboCapabilities(comboLookup[fullId], comboLookup, resolveCaps, _depth + 1)
+          ?? resolveCaps?.(fullId)
           ?? getCapabilitiesForModel(null, fullId);
     }
     const slash = fullId.indexOf("/");
     const provider = slash === -1 ? null : fullId.slice(0, slash);
     const model = slash === -1 ? fullId : fullId.slice(slash + 1);
-    return getCapabilitiesForModel(provider, model);
+    const local = getCapabilitiesForModel(provider, model);
+    const override = resolveCaps?.(fullId);
+    return override ? { ...local, ...override } : local;
   });
   const first = allCaps[0];
   return {
diff --git a/src/app/(dashboard)/dashboard/combos/page.js b/src/app/(dashboard)/dashboard/combos/page.js
index 6e0367bd..e3fe0563 100644
--- a/src/app/(dashboard)/dashboard/combos/page.js
+++ b/src/app/(dashboard)/dashboard/combos/page.js
@@ -568,7 +568,10 @@ function ComboCard({ combo, getCaps, comboByName = {}, activeProviders = [], cop
   const current = strategy.fallbackStrategy || "fallback";
   const judge = strategy.judgeModel || "";
   const isFusion = current === "fusion";
-  const comboCaps = aggregateComboCapabilities(combo.models, comboByName);
+  // The synced catalog is server-only, so resolving here would fall back to the
+  // generic patterns and under-report the limits. getCaps carries the server's
+  // answer for /api/models.
+  const comboCaps = aggregateComboCapabilities(combo.models, comboByName, getCaps);
 
   return (
     <Card padding="sm" className={`group ${selected ? "ring-1 ring-primary/40 bg-primary/[0.03]" : ""}`}>
@@ -598,7 +601,7 @@ function ComboCard({ combo, getCaps, comboByName = {}, activeProviders = [], cop
                     <span>{model}</span>
                     <CapacityBadges caps={
                       comboByName[model]
-                        ? aggregateComboCapabilities(comboByName[model], comboByName)
+                        ? aggregateComboCapabilities(comboByName[model], comboByName, getCaps)
                         : getCaps?.(model)
                     } />
                   </code>
diff --git a/tests/unit/combo-caps-resolver.test.js b/tests/unit/combo-caps-resolver.test.js
new file mode 100644
index 00000000..24d0d388
--- /dev/null
+++ b/tests/unit/combo-caps-resolver.test.js
@@ -0,0 +1,67 @@
+import { describe, expect, it } from "vitest";
+
+import { aggregateComboCapabilities, getCapabilitiesForModel } from "../../open-sse/providers/capabilities.js";
+
+// A combo's limits are the conservative aggregate of its members: ctx = min,
+// maxOutput = max. Resolving those members needs the synced model catalog, which
+// is server-only (it reads a file), so the browser bundle falls back to the
+// generic patterns. The dashboard computed its badges there and under-reported:
+// /v1/models and pi-settings (both server-side) said 1M while the badge said 200k.
+//
+// resolveCaps lets a caller hand in the server's answer. It must only override
+// what it carries — the local tables still own tools/pdf/audio/video/thinking*.
+const GLM53_FED = { vision: true, search: false, reasoning: true, contextWindow: 1_000_000, maxOutput: 131_072 };
+
+describe("aggregateComboCapabilities: resolveCaps override", () => {
+  const models = ["glm-cn/glm-5.3", "deepseek-v4.1-flash"];
+
+  it("falls back to the pattern default without a resolver", () => {
+    const caps = aggregateComboCapabilities(models);
+    // glm-5.3 has no exact entry, so the *glm-5.3* pattern gives 200k and caps the combo.
+    expect(caps.contextWindow).toBe(200_000);
+  });
+
+  it("uses the fed limits when a resolver supplies them", () => {
+    const resolver = (fullId) => (fullId === "glm-cn/glm-5.3" ? GLM53_FED : null);
+    const caps = aggregateComboCapabilities(models, null, resolver);
+    expect(caps.contextWindow).toBe(1_000_000);
+  });
+
+  it("keeps the fields the override does not carry", () => {
+    const plain = aggregateComboCapabilities(models);
+    const fed = aggregateComboCapabilities(models, null, (id) => (id === "glm-cn/glm-5.3" ? GLM53_FED : null));
+    // The override carries no tools/pdf/thinking fields, so those must be unchanged.
+    for (const field of ["tools", "pdf", "audioInput", "videoInput", "imageOutput", "audioOutput", "thinkingFormat"]) {
+      expect(fed[field]).toEqual(plain[field]);
+    }
+  });
+
+  it("still applies the conservative rule across members", () => {
+    const resolver = (fullId) => (fullId === "glm-cn/glm-5.3" ? GLM53_FED : null);
+    const caps = aggregateComboCapabilities(models, null, resolver);
+    // Only glm-5.3 was fed 1M; deepseek-v4.1-flash resolves locally to 1M, so min stays 1M.
+    // Feeding a *smaller* value for one member must pull the aggregate down.
+    const smaller = aggregateComboCapabilities(models, null, (id) => (id === "glm-cn/glm-5.3" ? { ...GLM53_FED, contextWindow: 64_000 } : null));
+    expect(smaller.contextWindow).toBe(64_000);
+    expect(caps.maxOutput).toBe(384_000); // max across members, from deepseek
+  });
+
+  it("passes the resolver into nested combos", () => {
+    const lookup = {
+      zap: ["deepseek-v4.1-flash", "glm-cn/glm-5.3-flash"],
+      "deepseek-v4.1-flash": ["cmc/deepseek/deepseek-v4.1-flash", "ocg/deepseek-v4.1-flash"],
+    };
+    const seen = [];
+    const resolver = (fullId) => { seen.push(fullId); return fullId === "glm-cn/glm-5.3-flash" ? { contextWindow: 1_000_000 } : null; };
+    aggregateComboCapabilities(lookup.zap, lookup, resolver);
+    // The nested combo's own members were resolved with the same resolver.
+    expect(seen).toContain("cmc/deepseek/deepseek-v4.1-flash");
+    expect(seen).toContain("ocg/deepseek-v4.1-flash");
+  });
+
+  it("leaves the plain two-argument call unchanged", () => {
+    const caps = aggregateComboCapabilities(["kimi/kimi-k3"], null);
+    expect(caps).toEqual(aggregateComboCapabilities(["kimi/kimi-k3"]));
+    expect(caps.contextWindow).toBe(getCapabilitiesForModel("kimi", "kimi-k3").contextWindow);
+  });
+});