diff --git a/packages/language-core/lib/codegen/script/scriptSetup.ts b/packages/language-core/lib/codegen/script/scriptSetup.ts
index 84fbeb991e..977edacf4b 100644
--- a/packages/language-core/lib/codegen/script/scriptSetup.ts
+++ b/packages/language-core/lib/codegen/script/scriptSetup.ts
@@ -1,5 +1,5 @@
 import type { ScriptSetupRanges } from '../../parsers/scriptSetupRanges';
-import type { Code, Sfc } from '../../types';
+import type { Code, Sfc, TextRange } from '../../types';
 import { endOfLine, generateSfcBlockSection, newLine } from '../common';
 import { generateComponent, generateEmitsOption } from './component';
 import type { ScriptCodegenContext } from './context';
@@ -88,16 +88,16 @@ export function* generateScriptSetup(
 
 	if (ctx.scriptSetupGeneratedOffset !== undefined) {
 		for (const defineProp of scriptSetupRanges.defineProp) {
-			if (!defineProp.name) {
+			if (!defineProp.localName) {
 				continue;
 			}
-			const propName = scriptSetup.content.substring(defineProp.name.start, defineProp.name.end);
-			const propMirror = definePropMirrors.get(propName);
+			const [_, localName] = getPropAndLocalName(scriptSetup, defineProp);
+			const propMirror = definePropMirrors.get(localName!);
 			if (propMirror !== undefined) {
 				options.linkedCodeMappings.push({
-					sourceOffsets: [defineProp.name.start + ctx.scriptSetupGeneratedOffset],
+					sourceOffsets: [defineProp.localName.start + ctx.scriptSetupGeneratedOffset],
 					generatedOffsets: [propMirror],
-					lengths: [defineProp.name.end - defineProp.name.start],
+					lengths: [defineProp.localName.end - defineProp.localName.start],
 					data: undefined,
 				});
 			}
@@ -302,14 +302,19 @@ function* generateComponentProps(
 		yield `const __VLS_defaults = {${newLine}`;
 		for (const defineProp of scriptSetupRanges.defineProp) {
 			if (defineProp.defaultValue) {
-				if (defineProp.name) {
-					yield scriptSetup.content.substring(defineProp.name.start, defineProp.name.end);
+				const [propName, localName] = getPropAndLocalName(scriptSetup, defineProp);
+
+				if (defineProp.name || defineProp.isModel) {
+					yield propName!;
+				}
+				else if (defineProp.localName) {
+					yield localName!;
 				}
 				else {
-					yield `modelValue`;
+					continue;
 				}
 				yield `: `;
-				yield scriptSetup.content.substring(defineProp.defaultValue.start, defineProp.defaultValue.end);
+				yield getRangeName(scriptSetup, defineProp.defaultValue);
 				yield `,${newLine}`;
 			}
 		}
@@ -331,33 +336,35 @@ function* generateComponentProps(
 		ctx.generatedPropsType = true;
 		yield `{${newLine}`;
 		for (const defineProp of scriptSetupRanges.defineProp) {
-			let propName = 'modelValue';
-			if (defineProp.name && defineProp.nameIsString) {
+			const [propName, localName] = getPropAndLocalName(scriptSetup, defineProp);
+
+			if (defineProp.isModel && !defineProp.name) {
+				yield propName!;
+			}
+			else if (defineProp.name) {
 				// renaming support
 				yield generateSfcBlockSection(scriptSetup, defineProp.name.start, defineProp.name.end, codeFeatures.navigation);
-				propName = scriptSetup.content.substring(defineProp.name.start, defineProp.name.end);
-				propName = propName.replace(/['"]+/g, '');
 			}
-			else if (defineProp.name) {
-				propName = scriptSetup.content.substring(defineProp.name.start, defineProp.name.end);
-				definePropMirrors.set(propName, options.getGeneratedLength());
-				yield propName;
+			else if (defineProp.localName) {
+				definePropMirrors.set(localName!, options.getGeneratedLength());
+				yield localName!;
 			}
 			else {
-				yield propName;
+				continue;
 			}
+
 			yield defineProp.required
 				? `: `
 				: `?: `;
-			yield* generateDefinePropType(scriptSetup, propName, defineProp);
+			yield* generateDefinePropType(scriptSetup, propName, localName, defineProp);
 			yield `,${newLine}`;
 
 			if (defineProp.modifierType) {
 				let propModifierName = 'modelModifiers';
 				if (defineProp.name) {
-					propModifierName = `${scriptSetup.content.substring(defineProp.name.start + 1, defineProp.name.end - 1)}Modifiers`;
+					propModifierName = `${getRangeName(scriptSetup, defineProp.name, true)}Modifiers`;
 				}
-				const modifierType = scriptSetup.content.substring(defineProp.modifierType.start, defineProp.modifierType.end);
+				const modifierType = getRangeName(scriptSetup, defineProp.modifierType);
 				definePropMirrors.set(propModifierName, options.getGeneratedLength());
 				yield `${propModifierName}?: Record<${modifierType}, true>,${endOfLine}`;
 			}
@@ -394,13 +401,10 @@ function* generateModelEmits(
 				continue;
 			}
 
-			let propName = 'modelValue';
-			if (defineProp.name) {
-				propName = scriptSetup.content.substring(defineProp.name.start, defineProp.name.end);
-				propName = propName.replace(/['"]+/g, '');
-			}
+			const [propName, localName] = getPropAndLocalName(scriptSetup, defineProp);
+
 			yield `'update:${propName}': [${propName}:`;
-			yield* generateDefinePropType(scriptSetup, propName, defineProp);
+			yield* generateDefinePropType(scriptSetup, propName, localName, defineProp);
 			yield `]${endOfLine}`;
 		}
 		yield `}`;
@@ -413,16 +417,21 @@ function* generateModelEmits(
 	yield endOfLine;
 }
 
-function* generateDefinePropType(scriptSetup: NonNullable<Sfc['scriptSetup']>, propName: string, defineProp: ScriptSetupRanges['defineProp'][number]) {
+function* generateDefinePropType(
+	scriptSetup: NonNullable<Sfc['scriptSetup']>,
+	propName: string | undefined,
+	localName: string | undefined,
+	defineProp: ScriptSetupRanges['defineProp'][number]
+) {
 	if (defineProp.type) {
 		// Infer from defineProp<T>
-		yield scriptSetup.content.substring(defineProp.type.start, defineProp.type.end);
+		yield getRangeName(scriptSetup, defineProp.type);
 	}
-	else if ((defineProp.name && defineProp.nameIsString) || !defineProp.nameIsString) {
+	else if (defineProp.runtimeType && localName) {
 		// Infer from actual prop declaration code 
-		yield `typeof ${propName}['value']`;
+		yield `typeof ${localName}['value']`;
 	}
-	else if (defineProp.defaultValue) {
+	else if (defineProp.defaultValue && propName) {
 		// Infer from defineProp({default: T})
 		yield `typeof __VLS_defaults['${propName}']`;
 	}
@@ -430,3 +439,30 @@ function* generateDefinePropType(scriptSetup: NonNullable<Sfc['scriptSetup']>, p
 		yield `any`;
 	}
 }
+
+function getPropAndLocalName(
+	scriptSetup: NonNullable<Sfc['scriptSetup']>,
+	defineProp: ScriptSetupRanges['defineProp'][number]
+) {
+	const localName = defineProp.localName
+		? getRangeName(scriptSetup, defineProp.localName)
+		: undefined;
+	let propName = defineProp.name
+		? getRangeName(scriptSetup, defineProp.name)
+		: defineProp.isModel
+			? 'modelValue'
+			: localName;
+	if (defineProp.name) {
+		propName = propName!.replace(/['"]+/g, '')
+	}
+	return [propName, localName];
+}
+
+function getRangeName(
+	scriptSetup: NonNullable<Sfc['scriptSetup']>,
+	range: TextRange,
+	unwrap = false
+) {
+	const offset = unwrap ? 1 : 0;
+	return scriptSetup.content.substring(range.start + offset, range.end - offset);
+}
\ No newline at end of file
diff --git a/packages/language-core/lib/parsers/scriptSetupRanges.ts b/packages/language-core/lib/parsers/scriptSetupRanges.ts
index ef3858993c..d173e7da4d 100644
--- a/packages/language-core/lib/parsers/scriptSetupRanges.ts
+++ b/packages/language-core/lib/parsers/scriptSetupRanges.ts
@@ -50,10 +50,11 @@ export function parseScriptSetupRanges(
 	const definePropProposalA = vueCompilerOptions.experimentalDefinePropProposal === 'kevinEdition' || ast.text.trimStart().startsWith('// @experimentalDefinePropProposal=kevinEdition');
 	const definePropProposalB = vueCompilerOptions.experimentalDefinePropProposal === 'johnsonEdition' || ast.text.trimStart().startsWith('// @experimentalDefinePropProposal=johnsonEdition');
 	const defineProp: {
+		localName: TextRange | undefined;
 		name: TextRange | undefined;
-		nameIsString: boolean;
 		type: TextRange | undefined;
 		modifierType?: TextRange | undefined;
+		runtimeType: TextRange | undefined;
 		defaultValue: TextRange | undefined;
 		required: boolean;
 		isModel?: boolean;
@@ -134,81 +135,136 @@ export function parseScriptSetupRanges(
 		) {
 			const callText = getNodeText(ts, node.expression, ast);
 			if (vueCompilerOptions.macros.defineModel.includes(callText)) {
-				let name: TextRange | undefined;
+				let localName: TextRange | undefined;
+				let propName: TextRange | undefined;
 				let options: ts.Node | undefined;
+
+				if (
+					ts.isVariableDeclaration(parent) &&
+					ts.isIdentifier(parent.name)
+				) {
+					localName = _getStartEnd(parent.name);
+				}
+
 				if (node.arguments.length >= 2) {
-					name = _getStartEnd(node.arguments[0]);
+					propName = _getStartEnd(node.arguments[0]);
 					options = node.arguments[1];
 				}
 				else if (node.arguments.length >= 1) {
 					if (ts.isStringLiteral(node.arguments[0])) {
-						name = _getStartEnd(node.arguments[0]);
+						propName = _getStartEnd(node.arguments[0]);
 					}
 					else {
 						options = node.arguments[0];
 					}
 				}
+
+				let runtimeType: TextRange | undefined;
+				let defaultValue: TextRange | undefined;
 				let required = false;
 				if (options && ts.isObjectLiteralExpression(options)) {
 					for (const property of options.properties) {
-						if (ts.isPropertyAssignment(property) && ts.isIdentifier(property.name) && getNodeText(ts, property.name, ast) === 'required' && property.initializer.kind === ts.SyntaxKind.TrueKeyword) {
+						if (!ts.isPropertyAssignment(property) || !ts.isIdentifier(property.name)) {
+							continue;
+						}
+						const text = getNodeText(ts, property.name, ast);
+						if (text === 'type') {
+							runtimeType = _getStartEnd(property.initializer);
+						}
+						else if (text === 'default') {
+							defaultValue = _getStartEnd(property.initializer);
+						}
+						else if (text === 'required' && property.initializer.kind === ts.SyntaxKind.TrueKeyword) {
 							required = true;
-							break;
 						}
 					}
 				}
 				defineProp.push({
-					name,
-					nameIsString: true,
+					localName,
+					name: propName,
 					type: node.typeArguments?.length ? _getStartEnd(node.typeArguments[0]) : undefined,
 					modifierType: node.typeArguments && node.typeArguments?.length >= 2 ? _getStartEnd(node.typeArguments[1]) : undefined,
-					defaultValue: undefined,
+					runtimeType,
+					defaultValue,
 					required,
 					isModel: true,
 				});
 			}
 			else if (callText === 'defineProp') {
+				let localName: TextRange | undefined;
+				let propName: TextRange | undefined;
+				let options: ts.Node | undefined;
+
+				if (
+					ts.isVariableDeclaration(parent) &&
+					ts.isIdentifier(parent.name)
+				) {
+					localName = _getStartEnd(parent.name);
+				}
+
+				let runtimeType: TextRange | undefined;
+				let defaultValue: TextRange | undefined;
+				let required = false;
 				if (definePropProposalA) {
-					let required = false;
 					if (node.arguments.length >= 2) {
-						const secondArg = node.arguments[1];
-						if (ts.isObjectLiteralExpression(secondArg)) {
-							for (const property of secondArg.properties) {
-								if (ts.isPropertyAssignment(property) && ts.isIdentifier(property.name) && getNodeText(ts, property.name, ast) === 'required' && property.initializer.kind === ts.SyntaxKind.TrueKeyword) {
-									required = true;
-									break;
-								}
+						options = node.arguments[1];
+					}
+					if (node.arguments.length >= 1) {
+						propName = _getStartEnd(node.arguments[0]);
+					}
+					
+					if (options && ts.isObjectLiteralExpression(options)) {
+						for (const property of options.properties) {
+							if (!ts.isPropertyAssignment(property) || !ts.isIdentifier(property.name)) {
+								continue;
+							}
+							const text = getNodeText(ts, property.name, ast);
+							if (text === 'type') {
+								runtimeType = _getStartEnd(property.initializer);
+							}
+							else if (text === 'default') {
+								defaultValue = _getStartEnd(property.initializer);
+							}
+							else if (text === 'required' && property.initializer.kind === ts.SyntaxKind.TrueKeyword) {
+								required = true;
 							}
 						}
 					}
+				}
+				else if (definePropProposalB) {
+					if (node.arguments.length >= 3) {
+						options = node.arguments[2];
+					}
+					if (node.arguments.length >= 2) {
+						if (node.arguments[1].kind === ts.SyntaxKind.TrueKeyword) {
+							required = true;
+						}
+					}
 					if (node.arguments.length >= 1) {
-						defineProp.push({
-							name: _getStartEnd(node.arguments[0]),
-							nameIsString: true,
-							type: node.typeArguments?.length ? _getStartEnd(node.typeArguments[0]) : undefined,
-							defaultValue: undefined,
-							required,
-						});
+						defaultValue = _getStartEnd(node.arguments[0]);
 					}
-					else if (ts.isVariableDeclaration(parent)) {
-						defineProp.push({
-							name: _getStartEnd(parent.name),
-							nameIsString: false,
-							type: node.typeArguments?.length ? _getStartEnd(node.typeArguments[0]) : undefined,
-							defaultValue: undefined,
-							required,
-						});
+
+					if (options && ts.isObjectLiteralExpression(options)) {
+						for (const property of options.properties) {
+							if (!ts.isPropertyAssignment(property) || !ts.isIdentifier(property.name)) {
+								continue;
+							}
+							const text = getNodeText(ts, property.name, ast);
+							if (text === 'type') {
+								runtimeType = _getStartEnd(property.initializer);
+							}
+						}
 					}
 				}
-				else if (definePropProposalB && ts.isVariableDeclaration(parent)) {
-					defineProp.push({
-						name: _getStartEnd(parent.name),
-						nameIsString: false,
-						defaultValue: node.arguments.length >= 1 ? _getStartEnd(node.arguments[0]) : undefined,
-						type: node.typeArguments?.length ? _getStartEnd(node.typeArguments[0]) : undefined,
-						required: node.arguments.length >= 2 && node.arguments[1].kind === ts.SyntaxKind.TrueKeyword,
-					});
-				}
+
+				defineProp.push({
+					localName,
+					name: propName,
+					type: node.typeArguments?.length ? _getStartEnd(node.typeArguments[0]) : undefined,
+					runtimeType,
+					defaultValue,
+					required,
+				});
 			}
 			else if (vueCompilerOptions.macros.defineSlots.includes(callText)) {
 				slots.define = parseDefineFunction(node);
diff --git a/test-workspace/tsc/passedFixtures/vue2/tsconfig.json b/test-workspace/tsc/passedFixtures/vue2/tsconfig.json
index 61eb1dbaff..7c1913090d 100644
--- a/test-workspace/tsc/passedFixtures/vue2/tsconfig.json
+++ b/test-workspace/tsc/passedFixtures/vue2/tsconfig.json
@@ -22,6 +22,7 @@
 		"../vue3/#4512",
 		"../vue3/#4540",
 		"../vue3/#4646",
+		"../vue3/#4649",
 		"../vue3/components",
 		"../vue3/defineEmits",
 		"../vue3/defineModel",
diff --git a/test-workspace/tsc/passedFixtures/vue3/#4649/main.vue b/test-workspace/tsc/passedFixtures/vue3/#4649/main.vue
new file mode 100644
index 0000000000..f4384a3425
--- /dev/null
+++ b/test-workspace/tsc/passedFixtures/vue3/#4649/main.vue
@@ -0,0 +1,24 @@
+<script lang="ts" setup>
+import ModelComp from './model-comp.vue';
+import PropComp from './prop-comp.vue';
+
+const model = '1';
+const foo = '1';
+const bar = '1';
+const baz = '1';
+</script>
+
+<template>
+	<!-- @vue-expect-error -->
+	<ModelComp v-model="model" />
+	<!-- @vue-expect-error -->
+	<ModelComp v-model:foo="foo" />
+	<!-- @vue-expect-error -->
+	<ModelComp v-model:bar="bar" />
+	<!-- @vue-expect-error -->
+	<PropComp :foo="foo" />
+	<!-- @vue-expect-error -->
+	<PropComp :bar="bar" />
+	<!-- @vue-expect-error -->
+	<PropComp :baz="baz" />
+</template>
diff --git a/test-workspace/tsc/passedFixtures/vue3/#4649/model-comp.vue b/test-workspace/tsc/passedFixtures/vue3/#4649/model-comp.vue
new file mode 100644
index 0000000000..a9f4fb8ba5
--- /dev/null
+++ b/test-workspace/tsc/passedFixtures/vue3/#4649/model-comp.vue
@@ -0,0 +1,18 @@
+<script lang="ts" setup>
+import { exactType } from '../../shared';
+
+const modelAlias = defineModel({
+	type: Number
+});
+const fooAlias = defineModel('foo', {
+	type: Number,
+	default: 1
+});
+const barAlias = defineModel('bar', {
+	default: 1
+});
+
+exactType(modelAlias.value, {} as number | undefined);
+exactType(fooAlias.value, {} as number);
+exactType(barAlias.value, {} as number);
+</script>
diff --git a/test-workspace/tsc/passedFixtures/vue3/#4649/prop-comp.vue b/test-workspace/tsc/passedFixtures/vue3/#4649/prop-comp.vue
new file mode 100644
index 0000000000..3f483c1427
--- /dev/null
+++ b/test-workspace/tsc/passedFixtures/vue3/#4649/prop-comp.vue
@@ -0,0 +1,21 @@
+<script lang="ts" setup>
+// @experimentalDefinePropProposal=kevinEdition
+import { exactType } from '../../shared';
+
+const fooAlias = defineProp('foo', {
+	type: Number
+});
+
+const barAlias = defineProp('bar', {
+	type: Number,
+	default: 1
+});
+
+const bazAlias = defineProp('baz', {
+	default: 1
+});
+
+exactType(fooAlias.value, {} as number | undefined);
+exactType(barAlias.value, {} as number);
+exactType(bazAlias.value, {} as number);
+</script>