diff --git a/internal/logic/relay/provider.go b/internal/logic/relay/provider.go
index 7e23bd5..da4116e 100644
--- a/internal/logic/relay/provider.go
+++ b/internal/logic/relay/provider.go
@@ -1405,3 +1405,9 @@ func (p *DataProviderImpl) CheckApiKeyModelAccess(ctx context.Context, apiKeyID
 	}
 	return false, nil
 }
+
+// InvalidateApiKeyModelCache 清除指定 API Key 的模型权限缓存
+func (p *DataProviderImpl) InvalidateApiKeyModelCache(ctx context.Context, apiKeyID int64) {
+	cacheKey := strconv.FormatInt(apiKeyID, 10)
+	apiKeyModelCache.Delete(ctx, cacheKey)
+}
diff --git a/internal/logic/tenant/api_key.go b/internal/logic/tenant/api_key.go
index 57d4190..5096f6c 100644
--- a/internal/logic/tenant/api_key.go
+++ b/internal/logic/tenant/api_key.go
@@ -14,6 +14,7 @@ import (
 	"github.com/qianfree/team-api/internal/logic/billing"
 	lcommon "github.com/qianfree/team-api/internal/logic/common"
 	"github.com/qianfree/team-api/internal/logic/relay"
+	lrelay "github.com/qianfree/team-api/internal/logic/relay"
 	"github.com/qianfree/team-api/internal/middleware"
 	do "github.com/qianfree/team-api/internal/model/do"
 
@@ -472,6 +473,8 @@ func (s *sTenant) ApiKeyUpdate(ctx context.Context, req *v1.TenantApiKeyUpdateRe
 
 	if hasUpdate || req.ModelNames != nil {
 		relay.InvalidateApiKey(ctx, info.KeyPrefix)
+		// 失效模型权限缓存（修复：更新模型范围后缓存未失效的问题）
+		lrelay.NewDataProvider().InvalidateApiKeyModelCache(ctx, keyID)
 	}
 
 	return &v1.TenantApiKeyUpdateRes{}, nil
@@ -527,6 +530,8 @@ func (s *sTenant) ApiKeyUpdateScopes(ctx context.Context, req *v1.TenantApiKeyUp
 	}
 
 	relay.InvalidateApiKey(ctx, info.KeyPrefix)
+	// 失效模型权限缓存（修复：更新模型范围后缓存未失效的问题）
+	lrelay.NewDataProvider().InvalidateApiKeyModelCache(ctx, keyID)
 
 	return &v1.TenantApiKeyUpdateScopesRes{}, nil
 }
diff --git a/relay/common/provider.go b/relay/common/provider.go
index d5c0240..a83754b 100644
--- a/relay/common/provider.go
+++ b/relay/common/provider.go
@@ -87,6 +87,9 @@ type DataProvider interface {
 	// InvalidateMemberModelCache 清除指定成员的模型范围缓存。
 	InvalidateMemberModelCache(ctx context.Context, tenantID, userID int64)
 
+	// InvalidateApiKeyModelCache 清除指定 API Key 的模型权限缓存。
+	InvalidateApiKeyModelCache(ctx context.Context, apiKeyID int64)
+
 	// MaterializeSelection 由新调度引擎的决策构造 ChannelSelection：
 	// 从目录快照取转发元数据，按 keyID 解密渠道 Key（keyID=0 时取渠道首个 active Key）。
 	MaterializeSelection(ctx context.Context, channelID, keyID int64, modelName string) (*ChannelSelection, error)