diff --git a/packages/types/src/providers/openai.ts b/packages/types/src/providers/openai.ts
index 1e7b44a45a0..47b883e0e10 100644
--- a/packages/types/src/providers/openai.ts
+++ b/packages/types/src/providers/openai.ts
@@ -551,6 +551,7 @@ export const openAiModelInfoSaneDefaults: ModelInfo = {
 	inputPrice: 0,
 	outputPrice: 0,
 	supportsNativeTools: true,
+	defaultToolProtocol: "native",
 }
 
 // https://learn.microsoft.com/en-us/azure/ai-services/openai/api-version-deprecation
diff --git a/src/utils/__tests__/resolveToolProtocol.spec.ts b/src/utils/__tests__/resolveToolProtocol.spec.ts
index d5f12b0b22f..68d3f3a2de8 100644
--- a/src/utils/__tests__/resolveToolProtocol.spec.ts
+++ b/src/utils/__tests__/resolveToolProtocol.spec.ts
@@ -1,6 +1,6 @@
 import { describe, it, expect } from "vitest"
 import { resolveToolProtocol } from "../resolveToolProtocol"
-import { TOOL_PROTOCOL } from "@roo-code/types"
+import { TOOL_PROTOCOL, openAiModelInfoSaneDefaults } from "@roo-code/types"
 import type { ProviderSettings, ModelInfo } from "@roo-code/types"
 
 describe("resolveToolProtocol", () => {
@@ -316,5 +316,14 @@ describe("resolveToolProtocol", () => {
 			const result = resolveToolProtocol(settings, modelInfo)
 			expect(result).toBe(TOOL_PROTOCOL.XML) // Model default wins
 		})
+
+		it("should use native tools for OpenAI compatible provider with default model info", () => {
+			const settings: ProviderSettings = {
+				apiProvider: "openai",
+			}
+			// Using the actual openAiModelInfoSaneDefaults to verify the fix
+			const result = resolveToolProtocol(settings, openAiModelInfoSaneDefaults)
+			expect(result).toBe(TOOL_PROTOCOL.NATIVE) // Should use native tools by default
+		})
 	})
 })