OpenRouter BYOK cost correction (#671)

Co-authored-by: Johan Otten <[email protected]>
Co-authored-by: Eamon Nerbonne <[email protected]>

Author: 3 people

.changeset/rotten-insects-tap.md

@@ -0,0 +1,5 @@
+---
+"kilo-code": patch
+---
+
+OpenRouter bring-your-own-key models now have much more accurate cost estimates.

src/api/providers/openrouter.ts

@@ -48,8 +48,11 @@ interface CompletionUsage {
 	}
 	total_tokens?: number
 	cost?: number
+	is_byok?: boolean // kilocode_change
 }
 
+const BYOK_COST_MULTIPLIER = 20 // kilocode_change
+
 export class OpenRouterHandler extends BaseProvider implements SingleCompletionHandler {
 	protected options: ApiHandlerOptions
 	private client: OpenAI
@@ -169,7 +172,7 @@ export class OpenRouterHandler extends BaseProvider implements SingleCompletionH
 				// and how to best support it.
 				// cacheReadTokens: lastUsage.prompt_tokens_details?.cached_tokens,
 				reasoningTokens: lastUsage.completion_tokens_details?.reasoning_tokens,
-				totalCost: lastUsage.cost || 0,
+				totalCost: (lastUsage.is_byok ? BYOK_COST_MULTIPLIER : 1) * (lastUsage.cost || 0), // kilocode_change byok
 			}
 		}
 	}