diff --git a/packages/types/src/model.ts b/packages/types/src/model.ts
index 8d67d3977f0..a97519af1f1 100644
--- a/packages/types/src/model.ts
+++ b/packages/types/src/model.ts
@@ -77,6 +77,8 @@ export const modelInfoSchema = z.object({
 	cachableFields: z.array(z.string()).optional(),
 	// Flag to indicate if the model is deprecated and should not be used
 	deprecated: z.boolean().optional(),
+	// Flag to indicate if the model is free (no cost)
+	isFree: z.boolean().optional(),
 	/**
 	 * Service tiers with pricing information.
 	 * Each tier can have a name (for OpenAI service tiers) and pricing overrides.
diff --git a/src/api/providers/fetchers/roo.ts b/src/api/providers/fetchers/roo.ts
index d7b212c3e87..1238f86b9a3 100644
--- a/src/api/providers/fetchers/roo.ts
+++ b/src/api/providers/fetchers/roo.ts
@@ -88,6 +88,7 @@ export async function getRooModels(baseUrl: string, apiKey?: string): Promise<Mo
 					cacheReadsPrice: cacheReadPrice,
 					description: model.description || model.name,
 					deprecated: model.deprecated || false,
+					isFree: tags.includes("free"),
 				}
 			}
 
diff --git a/src/api/providers/roo.ts b/src/api/providers/roo.ts
index 0c4776c0c68..ef21672fddf 100644
--- a/src/api/providers/roo.ts
+++ b/src/api/providers/roo.ts
@@ -117,13 +117,17 @@ export class RooHandler extends BaseOpenAiCompatibleProvider<string> {
 		}
 
 		if (lastUsage) {
+			// Check if the current model is marked as free
+			const model = this.getModel()
+			const isFreeModel = model.info.isFree ?? false
+
 			yield {
 				type: "usage",
 				inputTokens: lastUsage.prompt_tokens || 0,
 				outputTokens: lastUsage.completion_tokens || 0,
 				cacheWriteTokens: lastUsage.cache_creation_input_tokens,
 				cacheReadTokens: lastUsage.prompt_tokens_details?.cached_tokens,
-				totalCost: lastUsage.cost ?? 0,
+				totalCost: isFreeModel ? 0 : (lastUsage.cost ?? 0),
 			}
 		}
 	}