diff --git a/src/agents/live-model-filter.ts b/src/agents/live-model-filter.ts
index ff724075f16..3e4ce5dd256 100644
--- a/src/agents/live-model-filter.ts
+++ b/src/agents/live-model-filter.ts
@@ -74,6 +74,11 @@ function isPreGemini3ModelId(id: string): boolean {
   return Number.isFinite(major) && major < 3;
 }
 
+function isMutableLatestAliasLiveModelRef(id: string): boolean {
+  const modelName = normalizeLowercaseStringOrEmpty(id).split("/").pop() ?? "";
+  return modelName.endsWith("-latest");
+}
+
 function isOpenAiFamilyLiveModel(provider: string, id: string): boolean {
   const normalized = normalizeLowercaseStringOrEmpty(id);
   const modelName = normalized.split("/").pop() ?? "";
@@ -98,6 +103,9 @@ function isUnsupportedOpenAiLiveModelRef(provider: string, id: string): boolean
     return false;
   }
   const modelName = normalizeLowercaseStringOrEmpty(id).split("/").pop() ?? "";
+  if (provider === "openai" || provider === "openai-codex") {
+    return modelName !== "gpt-5.2";
+  }
   return !modelName.startsWith("gpt-5.2");
 }
 
@@ -111,6 +119,13 @@ function isOldGlmLiveModelRef(id: string): boolean {
   return /^glm-4(?:$|[.\-p])/.test(modelName);
 }
 
+function isUnsupportedFireworksLiveModelRef(provider: string, id: string): boolean {
+  if (provider !== "fireworks") {
+    return false;
+  }
+  return !HIGH_SIGNAL_LIVE_MODEL_PRIORITY_INDEX.has(`${provider}/${id}`);
+}
+
 export function isModernModelRef(ref: ModelRef): boolean {
   const provider = normalizeProviderId(ref.provider ?? "");
   const id = normalizeLowercaseStringOrEmpty(ref.id);
@@ -140,9 +155,15 @@ export function isHighSignalLiveModelRef(ref: ModelRef): boolean {
   if (isPreGemini3ModelId(id)) {
     return false;
   }
+  if (isMutableLatestAliasLiveModelRef(id)) {
+    return false;
+  }
   if (isUnsupportedOpenAiLiveModelRef(provider, id)) {
     return false;
   }
+  if (isUnsupportedFireworksLiveModelRef(provider, id)) {
+    return false;
+  }
   if (isOldMiniMaxLiveModelRef(id)) {
     return false;
   }
diff --git a/src/agents/model-compat.test.ts b/src/agents/model-compat.test.ts
index da4742f2d13..89c09a9b8c2 100644
--- a/src/agents/model-compat.test.ts
+++ b/src/agents/model-compat.test.ts
@@ -474,6 +474,10 @@ describe("isHighSignalLiveModelRef", () => {
     expect(isHighSignalLiveModelRef({ provider: "google", id: "gemini-3-flash-preview" })).toBe(
       true,
     );
+    expect(isHighSignalLiveModelRef({ provider: "google", id: "gemini-flash-latest" })).toBe(false);
+    expect(isHighSignalLiveModelRef({ provider: "google", id: "gemini-flash-lite-latest" })).toBe(
+      false,
+    );
   });
 
   it("keeps only GPT-5.2 OpenAI-family models in the default live matrix", () => {
@@ -492,6 +496,8 @@ describe("isHighSignalLiveModelRef", () => {
     expect(isHighSignalLiveModelRef({ provider: "openai", id: "gpt-5.1" })).toBe(false);
     expect(isHighSignalLiveModelRef({ provider: "openai", id: "gpt-5.4" })).toBe(false);
     expect(isHighSignalLiveModelRef({ provider: "openai", id: "gpt-5.5" })).toBe(false);
+    expect(isHighSignalLiveModelRef({ provider: "openai", id: "gpt-5.2-codex" })).toBe(false);
+    expect(isHighSignalLiveModelRef({ provider: "openai", id: "gpt-5.2-chat-latest" })).toBe(false);
     expect(isHighSignalLiveModelRef({ provider: "openrouter", id: "openai/gpt-5.1-chat" })).toBe(
       false,
     );
@@ -499,6 +505,8 @@ describe("isHighSignalLiveModelRef", () => {
       false,
     );
     expect(isHighSignalLiveModelRef({ provider: "openai", id: "gpt-5.2" })).toBe(true);
+    expect(isHighSignalLiveModelRef({ provider: "openai-codex", id: "gpt-5.2" })).toBe(true);
+    expect(isHighSignalLiveModelRef({ provider: "openai-codex", id: "gpt-5.2-codex" })).toBe(false);
     expect(isHighSignalLiveModelRef({ provider: "openrouter", id: "openai/gpt-5.2-chat" })).toBe(
       true,
     );
@@ -540,6 +548,18 @@ describe("isHighSignalLiveModelRef", () => {
     expect(
       isHighSignalLiveModelRef({ provider: "fireworks", id: "accounts/fireworks/models/glm-5p1" }),
     ).toBe(true);
+    expect(
+      isHighSignalLiveModelRef({
+        provider: "fireworks",
+        id: "accounts/fireworks/models/gpt-oss-120b",
+      }),
+    ).toBe(false);
+    expect(
+      isHighSignalLiveModelRef({
+        provider: "fireworks",
+        id: "accounts/fireworks/models/minimax-m2p7",
+      }),
+    ).toBe(false);
   });
 
   it("keeps DeepSeek V4 models in the default live matrix when the provider marks them modern", () => {