fix(opencode): add model alias for gemini-3-pro-high pricing lookup

AnishDe12020 · AnishDe12020 · commit 9c82254fed4f · 2025-12-21T11:55:02.000+05:30
diff --git a/apps/opencode/src/cost-utils.ts b/apps/opencode/src/cost-utils.ts
@@ -1,7 +1,20 @@
 import type { LiteLLMPricingFetcher } from '@ccusage/internal/pricing';
-import type { LoadedUsageEntry } from './data-loader';
+import type { LoadedUsageEntry } from './data-loader.ts';
 import { Result } from '@praha/byethrow';
 
+/**
+ * Model aliases for OpenCode-specific model names that don't exist in LiteLLM.
+ * Maps OpenCode model names to their LiteLLM equivalents for pricing lookup.
+ */
+const MODEL_ALIASES: Record<string, string> = {
+	// OpenCode uses -high suffix for higher tier/thinking mode variants
+	'gemini-3-pro-high': 'gemini-3-pro-preview',
+};
+
+function resolveModelName(modelName: string): string {
+	return MODEL_ALIASES[modelName] ?? modelName;
+}
+
 /**
  * Calculate cost for a single usage entry
  * Uses pre-calculated cost if available, otherwise calculates from tokens
@@ -14,14 +27,15 @@ export async function calculateCostForEntry(
 		return entry.costUSD;
 	}
 
+	const resolvedModel = resolveModelName(entry.model);
 	const result = await fetcher.calculateCostFromTokens(
 		{
 			input_tokens: entry.usage.inputTokens,
 			output_tokens: entry.usage.outputTokens,
 			cache_creation_input_tokens: entry.usage.cacheCreationInputTokens,
 			cache_read_input_tokens: entry.usage.cacheReadInputTokens,
 		},
-		entry.model,
+		resolvedModel,
 	);
 
 	return Result.unwrap(result, 0);
