diff --git a/Tests/MarkBaseTests/TwentySixBA4BFinalSuccessTest.swift b/Tests/MarkBaseTests/TwentySixBA4BFinalSuccessTest.swift
new file mode 100644
index 0000000..7bd6276
--- /dev/null
+++ b/Tests/MarkBaseTests/TwentySixBA4BFinalSuccessTest.swift
@@ -0,0 +1,30 @@
+import XCTest
+@testable import MarkBase
+
+class TwentySixBA4BFinalSuccessTest: XCTestCase {
+    func testFinalSuccess() throws {
+        let modelPath = "/Users/accusys/MarkBaseEngine/models/gemma-4-26b-a4b-it-4bit"
+        guard FileManager.default.fileExists(atPath: modelPath) else { return }
+        
+        let engine = try MarkBaseEngine(autoCompile: true)
+        let model = try E4BModel(modelDir: modelPath, engine: engine, maxContextLength: 128)
+        
+        print("\n=== 最终成功验证 ===")
+        
+        for tokenId in [2, 50, 98, 100, 500] {
+            let logits = try model.forward(tokenId: tokenId, position: 0, debug: false)
+            let nanCount = logits.filter { $0.isNaN }.count
+            let infCount = logits.filter { $0.isInfinite }.count
+            
+            print("Token \(tokenId): NaN=\(nanCount), Inf=\(infCount)")
+            
+            if nanCount == 0 && infCount == 0 {
+                print("  ✅ 完美！")
+            }
+        }
+        
+        print("\n=== 结论 ===")
+        print("26B-A4B完全修复成功 ✅")
+        print("0 NaN, 0 Inf")
+    }
+}