fix: update default model ID and disbale reason

Author: NaccOll

src/api/providers/copilot.ts

@@ -199,7 +199,7 @@ export class CopilotHandler extends BaseProvider implements SingleCompletionHand
 	}
 
 	override getModel() {
-		const id = this.options.copilotModelId ?? "claude-4"
+		const id = this.options.copilotModelId ?? "claude-sonnet-4"
 		if (id in this.models) {
 			const info = this.models[id]
 			const params = getModelParams({ format: "openai", modelId: id, model: info, settings: this.options })
@@ -343,7 +343,8 @@ export async function getCopilotModels(): Promise<ModelRecord> {
 				supportsComputerUse: false,
 				supportsPromptCache: true,
 				supportsVerbosity: false,
-				supportsReasoningBudget: !!model?.capabilities?.supports?.max_thinking_budget,
+				// supportsReasoningBudget: !!model?.capabilities?.supports?.max_thinking_budget,
+				supportsReasoningBudget: false,
 				requiredReasoningBudget: false,
 				supportsReasoningEffort: false,
 				supportedParameters: model?.capabilities?.supports?.max_thinking_budget ? ["reasoning"] : [],

webview-ui/src/components/settings/providers/Copilot.tsx

@@ -212,7 +212,7 @@ export const Copilot = ({
 						<ModelPicker
 							apiConfiguration={apiConfiguration}
 							setApiConfigurationField={setApiConfigurationField}
-							defaultModelId="claude-4"
+							defaultModelId="claude-sonnet-4"
 							models={copilotModels}
 							modelIdKey="copilotModelId"
 							serviceName="Copilot"