diff --git a/src/renderer/src/aiCore/prepareParams/__tests__/model-parameters.test.ts b/src/renderer/src/aiCore/prepareParams/__tests__/model-parameters.test.ts
index 70b4ac84b7..bdc1d7dd11 100644
--- a/src/renderer/src/aiCore/prepareParams/__tests__/model-parameters.test.ts
+++ b/src/renderer/src/aiCore/prepareParams/__tests__/model-parameters.test.ts
@@ -158,6 +158,29 @@ describe('modelParameters', () => {
 
       expect(getTemperature(assistant, model)).toBe(0.8)
     })
+
+    it('converts string temperature values to numbers', () => {
+      const assistant = createAssistant({ enableTemperature: true, temperature: '2.0' as any })
+      const model = createModel({ id: 'gpt-4o', provider: 'openai', group: 'openai' })
+
+      const result = getTemperature(assistant, model)
+      expect(result).toBe(2.0)
+      expect(typeof result).toBe('number')
+    })
+
+    it('converts string temperature values to numbers and clamps when necessary', () => {
+      const assistant = createAssistant({ enableTemperature: true, temperature: '1.5' as any })
+      const model = createModel({
+        id: 'claude-sonnet-3.5',
+        name: 'Claude 3.5 Sonnet',
+        provider: 'anthropic',
+        group: 'claude'
+      })
+
+      const result = getTemperature(assistant, model)
+      expect(result).toBe(1.0)
+      expect(typeof result).toBe('number')
+    })
   })
 
   describe('getTopP', () => {
@@ -200,6 +223,15 @@ describe('modelParameters', () => {
 
       expect(getTopP(assistant, model)).toBeUndefined()
     })
+
+    it('converts string topP values to numbers', () => {
+      const assistant = createAssistant({ enableTopP: true, topP: '0.9' as any })
+      const model = createModel({ id: 'gpt-4o', provider: 'openai', group: 'openai' })
+
+      const result = getTopP(assistant, model)
+      expect(result).toBe(0.9)
+      expect(typeof result).toBe('number')
+    })
   })
 
   describe('getTimeout', () => {
diff --git a/src/renderer/src/aiCore/utils/__tests__/reasoning.test.ts b/src/renderer/src/aiCore/utils/__tests__/reasoning.test.ts
index 36253e5c1d..082a80e11d 100644
--- a/src/renderer/src/aiCore/utils/__tests__/reasoning.test.ts
+++ b/src/renderer/src/aiCore/utils/__tests__/reasoning.test.ts
@@ -988,5 +988,29 @@ describe('reasoning utils', () => {
         valid: 'value3'
       })
     })
+
+    it('should convert string number values to actual numbers for number type parameters', async () => {
+      const assistant: Assistant = {
+        id: 'test',
+        name: 'Test',
+        settings: {
+          customParameters: [
+            { name: 'temperature', value: '2.0' as any, type: 'number' },
+            { name: 'maxTokens', value: '1000' as any, type: 'number' },
+            { name: 'topP', value: '0.9' as any, type: 'number' }
+          ]
+        }
+      } as Assistant
+
+      const result = getCustomParameters(assistant)
+      expect(result).toEqual({
+        temperature: 2.0,
+        maxTokens: 1000,
+        topP: 0.9
+      })
+      expect(typeof result.temperature).toBe('number')
+      expect(typeof result.maxTokens).toBe('number')
+      expect(typeof result.topP).toBe('number')
+    })
   })
 })