diff --git a/backend/internal/pkg/antigravity/claude_types.go b/backend/internal/pkg/antigravity/claude_types.go
index 8cd42298..7c127b90 100644
--- a/backend/internal/pkg/antigravity/claude_types.go
+++ b/backend/internal/pkg/antigravity/claude_types.go
@@ -28,7 +28,7 @@ type ClaudeMessage struct {
 // ThinkingConfig Thinking 配置
 type ThinkingConfig struct {
 	Type         string `json:"type"`                    // "enabled" / "adaptive" / "disabled"
-	BudgetTokens int    `json:"budget_tokens,omitempty"` // thinking budget（-1 表示动态预算）
+	BudgetTokens int    `json:"budget_tokens,omitempty"` // thinking budget
 }
 
 // ClaudeMetadata 请求元数据
diff --git a/backend/internal/pkg/antigravity/request_transformer.go b/backend/internal/pkg/antigravity/request_transformer.go
index e20b00db..3ba04b95 100644
--- a/backend/internal/pkg/antigravity/request_transformer.go
+++ b/backend/internal/pkg/antigravity/request_transformer.go
@@ -618,9 +618,8 @@ func buildGenerationConfig(req *ClaudeRequest) *GeminiGenerationConfig {
 			IncludeThoughts: true,
 		}
 
-		// - thinking.type=enabled：budget_tokens>0 用显式预算；否则使用动态预算（-1）
+		// - thinking.type=enabled：budget_tokens>0 用显式预算
 		// - thinking.type=adaptive：仅在 Antigravity 的 Opus 4.6 上覆写为 （24576）
-		//   （CLIProxyAPI 先翻译为 thinkingLevel="high"，再按模型能力转换为预算值）。
 		budget := -1
 		if req.Thinking.BudgetTokens > 0 {
 			budget = req.Thinking.BudgetTokens