diff --git a/apps/gateway/src/chat/chat.ts b/apps/gateway/src/chat/chat.ts
index 27646eff4..33835fb9d 100644
--- a/apps/gateway/src/chat/chat.ts
+++ b/apps/gateway/src/chat/chat.ts
@@ -3802,34 +3802,20 @@ chat.openapi(completions, async (c) => {
 		}
 	}
 
-	// For Moonshot provider, enrich assistant messages with cached reasoning_content
-	// This is needed for multi-turn tool call conversations with thinking models
-	// Moonshot requires reasoning_content in assistant messages with tool_calls
+	// Moonshot's thinking models reject assistant tool_call messages that lack
+	// reasoning_content. If the client echoes `reasoning` (OpenAI-style) we map
+	// it across; otherwise fall back to an empty string so multi-turn tool
+	// conversations don't 400.
 	if (usedProvider === "moonshot") {
-		const { redisClient } = await import("@llmgateway/cache");
 		for (const message of messages) {
 			if (
 				message.role === "assistant" &&
 				message.tool_calls &&
 				Array.isArray(message.tool_calls) &&
 				message.tool_calls.length > 0 &&
-				!(message as any).reasoning_content // Only add if not already present
+				!(message as any).reasoning_content
 			) {
-				// Get reasoning_content from the first tool call (all tool calls share the same reasoning)
-				const firstToolCall = message.tool_calls[0];
-				if (firstToolCall?.id) {
-					try {
-						const cachedReasoningContent = await redisClient.get(
-							`reasoning_content:${firstToolCall.id}`,
-						);
-						if (cachedReasoningContent) {
-							// Add reasoning_content to the message for Moonshot
-							(message as any).reasoning_content = cachedReasoningContent;
-						}
-					} catch {
-						// Silently fail - reasoning_content caching is optional
-					}
-				}
+				(message as any).reasoning_content = (message as any).reasoning ?? "";
 			}
 		}
 	}
diff --git a/apps/gateway/src/chat/tools/parse-provider-response.ts b/apps/gateway/src/chat/tools/parse-provider-response.ts
index f2e6b2fc4..00dee3681 100644
--- a/apps/gateway/src/chat/tools/parse-provider-response.ts
+++ b/apps/gateway/src/chat/tools/parse-provider-response.ts
@@ -835,31 +835,6 @@ export function parseProviderResponse(
 		}
 	}
 
-	// Cache reasoning_content for Moonshot thinking models when tool_calls are present
-	// This is needed for multi-turn tool call conversations because Moonshot requires
-	// reasoning_content to be included in assistant messages with tool_calls
-	if (
-		usedProvider === "moonshot" &&
-		reasoningContent &&
-		toolResults &&
-		Array.isArray(toolResults) &&
-		toolResults.length > 0
-	) {
-		for (const toolCall of toolResults) {
-			if (toolCall.id) {
-				redisClient
-					.setex(
-						`reasoning_content:${toolCall.id}`,
-						86400, // 1 day expiration
-						reasoningContent,
-					)
-					.catch((err) => {
-						logger.error("Failed to cache reasoning_content", { err });
-					});
-			}
-		}
-	}
-
 	// For non-reasoning models that return their answer in reasoning_content
 	// (e.g. CanopyWave Mimo), move reasoning to content so the response is visible.
 	if (!supportsReasoning && !content && reasoningContent) {