From c8bda598f55bd0d104c979866605b5cc61d1250a Mon Sep 17 00:00:00 2001
From: Ivan <ivan.boatri@gmail.com>
Date: Wed, 12 Nov 2025 20:41:44 +0200
Subject: [PATCH] fix: correct cache cost for OpenRouter and other
 OpenAI-compatible providers (#4256)

---
 packages/opencode/src/session/index.ts | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/packages/opencode/src/session/index.ts b/packages/opencode/src/session/index.ts
index d0bdfb9e..dff23c24 100644
--- a/packages/opencode/src/session/index.ts
+++ b/packages/opencode/src/session/index.ts
@@ -378,8 +378,14 @@ export namespace Session {
       metadata: z.custom<ProviderMetadata>().optional(),
     }),
     (input) => {
+      const cachedInputTokens = input.usage.cachedInputTokens ?? 0
+      const excludesCachedTokens = !!(input.metadata?.["anthropic"] || input.metadata?.["bedrock"])
+      const adjustedInputTokens = excludesCachedTokens
+        ? (input.usage.inputTokens ?? 0)
+        : (input.usage.inputTokens ?? 0) - cachedInputTokens
+
       const tokens = {
-        input: input.usage.inputTokens ?? 0,
+        input: adjustedInputTokens,
         output: input.usage.outputTokens ?? 0,
         reasoning: input.usage?.reasoningTokens ?? 0,
         cache: {
@@ -387,7 +393,7 @@ export namespace Session {
             // @ts-expect-error
             input.metadata?.["bedrock"]?.["usage"]?.["cacheWriteInputTokens"] ??
             0) as number,
-          read: input.usage.cachedInputTokens ?? 0,
+          read: cachedInputTokens,
         },
       }
       return {