Add support for perplexity/sonar-reasoning

src/api/providers/openrouter.ts

@@ -114,11 +114,21 @@ export class OpenRouterHandler implements ApiHandler, SingleCompletionHandler {
 		}
 
 		let temperature = 0
-		if (this.getModel().id === "deepseek/deepseek-r1" || this.getModel().id.startsWith("deepseek/deepseek-r1:")) {
+		let topP: number | undefined = undefined
+
+		// Handle models based on deepseek-r1
+		if (
+			this.getModel().id === "deepseek/deepseek-r1" ||
+			this.getModel().id.startsWith("deepseek/deepseek-r1:") ||
+			this.getModel().id === "perplexity/sonar-reasoning"
+		) {
 			// Recommended temperature for DeepSeek reasoning models
 			temperature = 0.6
-			// DeepSeek highly recommends using user instead of system role
+			// DeepSeek highly recommends using user instead of system
+			// role
 			openAiMessages = convertToR1Format([{ role: "user", content: systemPrompt }, ...messages])
+			// Some provider support topP and 0.95 is value that Deepseek used in their benchmarks
+			topP = 0.95
 		}
 
 		// https://openrouter.ai/docs/transforms
@@ -127,6 +137,7 @@ export class OpenRouterHandler implements ApiHandler, SingleCompletionHandler {
 			model: this.getModel().id,
 			max_tokens: maxTokens,
 			temperature: temperature,
+			top_p: topP,
 			messages: openAiMessages,
 			stream: true,
 			include_reasoning: true,