Add Mistral Medium 3.5 model option and reasoning hint

Author: Android-PowerUser

app/src/main/kotlin/com/google/ai/sample/GenerativeAiViewModelFactory.kt

@@ -44,6 +44,7 @@ enum class ModelOption(
     CLOUDFLARE_KIMI_K2_6("Kimi K2.6 (Cloudflare)", "@cf/moonshotai/kimi-k2.6", ApiProvider.CLOUDFLARE, supportsScreenshot = true),
     MISTRAL_LARGE_3("Mistral Large 3", "mistral-large-latest", ApiProvider.MISTRAL),
     MISTRAL_MEDIUM_3_1("Mistral Medium 3.1", "mistral-medium-latest", ApiProvider.MISTRAL),
+    MISTRAL_MEDIUM_3_5("Mistral Medium 3.5", "mistral-medium-3-5", ApiProvider.MISTRAL),
     GPT_5_1_CODEX_MAX("GPT-5.1 Codex Max (Vercel)", "openai/gpt-5.1-codex-max", ApiProvider.VERCEL),
     GPT_5_1_CODEX_MINI("GPT-5.1 Codex Mini (Vercel)", "openai/gpt-5.1-codex-mini", ApiProvider.VERCEL),
     GPT_5_NANO("GPT-5 Nano (Vercel)", "openai/gpt-5-nano", ApiProvider.VERCEL),

app/src/main/kotlin/com/google/ai/sample/MenuScreen.kt

@@ -215,13 +215,15 @@ fun MenuScreen(
                                 }
                                 val normalModels = allModels.filter {
                                     it != ModelOption.MISTRAL_MEDIUM_3_1 &&
+                                        it != ModelOption.MISTRAL_MEDIUM_3_5 &&
                                         it != ModelOption.PUTER_GPT_5_4_NANO &&
                                         it.apiProvider != ApiProvider.VERCEL &&
                                         !STRIKETHROUGH_MODELS.contains(it)
                                 }
                                 val orderedModels = listOf(
                                     ModelOption.PUTER_GPT_5_4_NANO,
-                                    ModelOption.MISTRAL_MEDIUM_3_1
+                                    ModelOption.MISTRAL_MEDIUM_3_1,
+                                    ModelOption.MISTRAL_MEDIUM_3_5
                                 ) +
                                     normalModels +
                                     vercelModels +
@@ -290,6 +292,8 @@ fun MenuScreen(
                         val modelHint = when (selectedModel) {
                             ModelOption.GEMMA_3_27B_IT -> "Google doesn't support screenshots in the API for this model."
                             ModelOption.GPT_OSS_120B -> "This is a pure text model\nCerebras sometimes discontinues free access in the Free Tier, displaying an \"Error 404: gpt-oss-120b does not exist or you do not have access to it\" message, or changes the rate limits."
+                            ModelOption.MISTRAL_MEDIUM_3_1,
+                            ModelOption.MISTRAL_MEDIUM_3_5 -> "This is a reasoning model"
                             ModelOption.MISTRAL_LARGE_3 -> "Mistral AI rejects requests containing non-black images with a 429 Error: Rate limit exceeded response"
                             ModelOption.GEMINI_3_FLASH -> "Google often rejects requests to this model with a 503 Model is exhausted error"
                             ModelOption.PUTER_GLM5 -> "This model is expensive and uses up the free quota quickly. Consider GPT-5.4 Nano."

app/src/main/kotlin/com/google/ai/sample/ScreenCaptureApiClients.kt

@@ -134,10 +134,14 @@ internal suspend fun callMistralApi(
             .build()
 
         val keysForCoordinator = availableApiKeys.filter { it.isNotBlank() }.distinct().ifEmpty { listOf(apiKey) }
-        val minIntervalMs = if (modelName == com.google.ai.sample.ModelOption.MISTRAL_MEDIUM_3_1.modelName) 420L else 1500L
+        val minIntervalMs = if (
+            modelName == com.google.ai.sample.ModelOption.MISTRAL_MEDIUM_3_1.modelName ||
+            modelName == com.google.ai.sample.ModelOption.MISTRAL_MEDIUM_3_5.modelName
+        ) 420L else 1500L
         val maxAttempts = if (
             modelName == com.google.ai.sample.ModelOption.MISTRAL_LARGE_3.modelName ||
-            modelName == com.google.ai.sample.ModelOption.MISTRAL_MEDIUM_3_1.modelName
+            modelName == com.google.ai.sample.ModelOption.MISTRAL_MEDIUM_3_1.modelName ||
+            modelName == com.google.ai.sample.ModelOption.MISTRAL_MEDIUM_3_5.modelName
         ) {
             3
         } else {

app/src/main/kotlin/com/google/ai/sample/feature/multimodal/PhotoReasoningViewModel.kt

@@ -1377,12 +1377,14 @@ class PhotoReasoningViewModel(
             // Validate that we have at least one key before proceeding
             require(availableKeys.isNotEmpty()) { "No valid Mistral API keys available after filtering" }
             val mistralMinIntervalMs = when (currentModel) {
-                ModelOption.MISTRAL_MEDIUM_3_1 -> 420L
+                ModelOption.MISTRAL_MEDIUM_3_1,
+                ModelOption.MISTRAL_MEDIUM_3_5 -> 420L
                 else -> 1500L
             }
             val maxAttempts = when (currentModel) {
                 ModelOption.MISTRAL_LARGE_3,
-                ModelOption.MISTRAL_MEDIUM_3_1 -> 3
+                ModelOption.MISTRAL_MEDIUM_3_1,
+                ModelOption.MISTRAL_MEDIUM_3_5 -> 3
                 else -> availableKeys.size * 4 + 8
             }
             val coordinated = MistralRequestCoordinator.execute(