diff --git a/.gitignore b/.gitignore
index d6906ed5..ee4c3373 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ docs/*
 logs/*
 auths/*
 !auths/.gitkeep
+AGENTS.md
\ No newline at end of file
diff --git a/internal/client/openai-compatibility_client.go b/internal/client/openai-compatibility_client.go
index 0e9a08b4..ae2fc144 100644
--- a/internal/client/openai-compatibility_client.go
+++ b/internal/client/openai-compatibility_client.go
@@ -44,7 +44,7 @@ type OpenAICompatibilityClient struct {
 // Returns:
 //   - *OpenAICompatibilityClient: A new OpenAI compatibility client instance.
 //   - error: An error if the client creation fails.
-func NewOpenAICompatibilityClient(cfg *config.Config, compatConfig *config.OpenAICompatibility) (*OpenAICompatibilityClient, error) {
+func NewOpenAICompatibilityClient(cfg *config.Config, compatConfig *config.OpenAICompatibility, apiKeyIndex int) (*OpenAICompatibilityClient, error) {
 	if compatConfig == nil {
 		return nil, fmt.Errorf("compatibility configuration is required")
 	}
@@ -53,10 +53,14 @@ func NewOpenAICompatibilityClient(cfg *config.Config, compatConfig *config.OpenA
 		return nil, fmt.Errorf("at least one API key is required for OpenAI compatibility provider: %s", compatConfig.Name)
 	}
 
+	if len(compatConfig.APIKeys) <= apiKeyIndex {
+		return nil, fmt.Errorf("invalid API key index for OpenAI compatibility provider: %s", compatConfig.Name)
+	}
+
 	httpClient := util.SetProxy(cfg, &http.Client{})
 
 	// Generate unique client ID
-	clientID := fmt.Sprintf("openai-compatibility-%s-%d", compatConfig.Name, time.Now().UnixNano())
+	clientID := fmt.Sprintf("openai-compatibility-%s-%d-%d", compatConfig.Name, apiKeyIndex, time.Now().UnixNano())
 
 	client := &OpenAICompatibilityClient{
 		ClientBase: ClientBase{
@@ -66,7 +70,7 @@ func NewOpenAICompatibilityClient(cfg *config.Config, compatConfig *config.OpenA
 			modelQuotaExceeded: make(map[string]*time.Time),
 		},
 		compatConfig:       compatConfig,
-		currentAPIKeyIndex: 0,
+		currentAPIKeyIndex: apiKeyIndex,
 	}
 
 	// Initialize model registry
@@ -134,8 +138,6 @@ func (c *OpenAICompatibilityClient) GetCurrentAPIKey() string {
 	}
 
 	key := c.compatConfig.APIKeys[c.currentAPIKeyIndex]
-	// Rotate to next key for load balancing
-	c.currentAPIKeyIndex = (c.currentAPIKeyIndex + 1) % len(c.compatConfig.APIKeys)
 	return key
 }
 
diff --git a/internal/cmd/run.go b/internal/cmd/run.go
index 07b57d57..7cfaa155 100644
--- a/internal/cmd/run.go
+++ b/internal/cmd/run.go
@@ -335,14 +335,16 @@ func buildAPIKeyClients(cfg *config.Config) (map[string]interfaces.Client, int,
 
 	if len(cfg.OpenAICompatibility) > 0 {
 		for _, compatConfig := range cfg.OpenAICompatibility {
-			log.Debugf("Initializing OpenAI compatibility client for provider: %s", compatConfig.Name)
-			compatClient, errClient := client.NewOpenAICompatibilityClient(cfg, &compatConfig)
-			if errClient != nil {
-				log.Errorf("failed to create OpenAI compatibility client for %s: %v", compatConfig.Name, errClient)
-				continue
+			for i := 0; i < len(compatConfig.APIKeys); i++ {
+				log.Debugf("Initializing OpenAI compatibility client for provider: %s", compatConfig.Name)
+				compatClient, errClient := client.NewOpenAICompatibilityClient(cfg, &compatConfig, i)
+				if errClient != nil {
+					log.Errorf("failed to create OpenAI compatibility client for %s: %v", compatConfig.Name, errClient)
+					continue
+				}
+				apiKeyClients[compatClient.GetClientID()] = compatClient
+				openAICompatCount++
 			}
-			apiKeyClients[compatClient.GetClientID()] = compatClient
-			openAICompatCount++
 		}
 	}
 
diff --git a/internal/watcher/watcher.go b/internal/watcher/watcher.go
index 78d17af4..b8750017 100644
--- a/internal/watcher/watcher.go
+++ b/internal/watcher/watcher.go
@@ -549,13 +549,15 @@ func buildAPIKeyClients(cfg *config.Config) (map[string]interfaces.Client, int,
 	}
 	if len(cfg.OpenAICompatibility) > 0 {
 		for _, compatConfig := range cfg.OpenAICompatibility {
-			compatClient, errClient := client.NewOpenAICompatibilityClient(cfg, &compatConfig)
-			if errClient != nil {
-				log.Errorf("failed to create OpenAI-compatibility client for %s: %v", compatConfig.Name, errClient)
-				continue
+			for i := 0; i < len(compatConfig.APIKeys); i++ {
+				compatClient, errClient := client.NewOpenAICompatibilityClient(cfg, &compatConfig, i)
+				if errClient != nil {
+					log.Errorf("failed to create OpenAI-compatibility client for %s: %v", compatConfig.Name, errClient)
+					continue
+				}
+				apiKeyClients[compatClient.GetClientID()] = compatClient
+				openAICompatCount++
 			}
-			apiKeyClients[compatClient.GetClientID()] = compatClient
-			openAICompatCount++
 		}
 	}
 	return apiKeyClients, glAPIKeyCount, claudeAPIKeyCount, codexAPIKeyCount, openAICompatCount