From 1b966dbea117db37dd3294ad094fb4c7e3b3c549 Mon Sep 17 00:00:00 2001
From: alfadb <alfadb@163.com>
Date: Sun, 26 Jul 2026 16:53:18 +0800
Subject: [PATCH] fix: treat Kimi 1M suffix as client syntax

---
 backend/internal/service/billing_service.go        |  6 +++---
 backend/internal/service/billing_service_test.go   | 12 ++++--------
 backend/internal/service/thinking_protocol_test.go |  1 -
 3 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/backend/internal/service/billing_service.go b/backend/internal/service/billing_service.go
index 01f93285d7..898138e799 100644
--- a/backend/internal/service/billing_service.go
+++ b/backend/internal/service/billing_service.go
@@ -714,13 +714,13 @@ func (s *BillingService) getFallbackPricing(model string) *ModelPricing {
 
 	// 月之暗面 Kimi（kimi-k3 / k3 / k3-256k / kimi-k2.6 / kimi-for-coding / kimi-k2.5 / kimi-k2-thinking / kimi-k2）
 	// K2-0905 / K2-0711 官方未保留定价，不进入 fallback。
-	// K3 规则置于 K2 前：API Platform 仅官方 kimi-k3 / kimi-k3[1m]（及 / 路径后缀）；
+	// K3 规则置于 K2 前：API Platform 仅官方 kimi-k3（及 / 路径后缀）；
 	// Code bare aliases 仅精确 k3 / k3-256k 或 /k3|/k3-256k 后缀，避免 kimi-k30 等未知型号误命中。
+	// 注意：kimi-k3[1m] 是 Claude Code 上下文选择语法，不是 Kimi API 模型 ID，不进入 fallback。
 	if strings.Contains(modelLower, "kimi-for-coding") {
 		return s.fallbackPrices["kimi-for-coding"]
 	}
-	if modelLower == "kimi-k3" || modelLower == "kimi-k3[1m]" ||
-		strings.HasSuffix(modelLower, "/kimi-k3") || strings.HasSuffix(modelLower, "/kimi-k3[1m]") ||
+	if modelLower == "kimi-k3" || strings.HasSuffix(modelLower, "/kimi-k3") ||
 		modelLower == "k3" || modelLower == "k3-256k" ||
 		strings.HasSuffix(modelLower, "/k3") || strings.HasSuffix(modelLower, "/k3-256k") {
 		return s.fallbackPrices["kimi-k3"]
diff --git a/backend/internal/service/billing_service_test.go b/backend/internal/service/billing_service_test.go
index e1f2bd7b22..5320df9f19 100644
--- a/backend/internal/service/billing_service_test.go
+++ b/backend/internal/service/billing_service_test.go
@@ -596,13 +596,6 @@ func TestGetFallbackPricing_FamilyMatching(t *testing.T) {
 			expectedOutput:    floatPtr(15e-6),
 			expectedCacheRead: floatPtr(0.30e-6),
 		},
-		{
-			name:              "kimi k3 anthropic 1m suffix",
-			model:             "kimi-k3[1m]",
-			expectedInput:     3e-6,
-			expectedOutput:    floatPtr(15e-6),
-			expectedCacheRead: floatPtr(0.30e-6),
-		},
 		{
 			name:              "kimi code bare alias k3",
 			model:             "k3",
@@ -619,7 +612,7 @@ func TestGetFallbackPricing_FamilyMatching(t *testing.T) {
 		},
 		{
 			name:              "kimi k3 path suffix moonshot",
-			model:             "moonshot/kimi-k3[1m]",
+			model:             "moonshot/kimi-k3",
 			expectedInput:     3e-6,
 			expectedOutput:    floatPtr(15e-6),
 			expectedCacheRead: floatPtr(0.30e-6),
@@ -753,6 +746,9 @@ func TestGetFallbackPricing_FamilyMatching(t *testing.T) {
 		// kimi-k3 非 Contains：kimi-k30 / 内嵌 foo-kimi-k3-bar 不得误命中。
 		{name: "kimi-k30 unknown no fallback", model: "kimi-k30", expectNilPricing: true},
 		{name: "embedded kimi-k3 unknown no fallback", model: "foo-kimi-k3-bar", expectNilPricing: true},
+		// kimi-k3[1m] 是 Claude Code 上下文选择语法，不是 Kimi API 模型 ID，不命中 fallback。
+		{name: "kimi-k3[1m] not an API model id no fallback", model: "kimi-k3[1m]", expectNilPricing: true},
+		{name: "path kimi-k3[1m] not an API model id no fallback", model: "moonshot/kimi-k3[1m]", expectNilPricing: true},
 		// kimi-k2-0905 / kimi-k2-0711 官方未公布独立价，走 kimi-k2 隐性回退（接受）——
 		// 如未来官方公布独立价，需在 getFallbackPricing 加显式分支。
 		{
diff --git a/backend/internal/service/thinking_protocol_test.go b/backend/internal/service/thinking_protocol_test.go
index e16cfdec58..c3c209ed5e 100644
--- a/backend/internal/service/thinking_protocol_test.go
+++ b/backend/internal/service/thinking_protocol_test.go
@@ -23,7 +23,6 @@ func TestResolveThinkingProtocol(t *testing.T) {
 		{"kimi-coding", "kimi-coding-v2", ThinkingProtocolPassbackRequired},
 		{"kimi-k2-thinking", "kimi-k2-thinking", ThinkingProtocolPassbackRequired},
 		{"kimi-k3 platform", "kimi-k3", ThinkingProtocolPassbackRequired},
-		{"kimi-k3 anthropic 1m", "kimi-k3[1m]", ThinkingProtocolPassbackRequired},
 		{"kimi code bare k3", "k3", ThinkingProtocolPassbackRequired},
 		{"kimi code bare k3-256k", "k3-256k", ThinkingProtocolPassbackRequired},
 		{"moonshot-v1", "moonshot-v1-32k", ThinkingProtocolPassbackRequired},