diff --git a/config.example.yaml b/config.example.yaml
index 8457e103..02e085b1 100644
--- a/config.example.yaml
+++ b/config.example.yaml
@@ -62,6 +62,8 @@ ws-auth: false
 #    headers:
 #      X-Custom-Header: "custom-value"
 #    proxy-url: "socks5://proxy.example.com:1080"
+#    model-blacklist:
+#      - "gemini-2.0-pro-exp" # exclude specific models from this provider
 #  - api-key: "AIzaSy...02"
 
 # API keys for official Generative Language API (legacy compatibility)
@@ -76,6 +78,8 @@ ws-auth: false
 #    headers:
 #      X-Custom-Header: "custom-value"
 #    proxy-url: "socks5://proxy.example.com:1080" # optional: per-key proxy override
+#    model-blacklist:
+#      - "gpt-5" # exclude specific models from this provider
 
 # Claude API keys
 #claude-api-key:
@@ -88,6 +92,8 @@ ws-auth: false
 #    models:
 #      - name: "claude-3-5-sonnet-20241022" # upstream model name
 #        alias: "claude-sonnet-latest" # client alias mapped to the upstream model
+#    model-blacklist:
+#      - "claude-3-5-sonnet-20241022" # exclude specific models from this provider
 
 # OpenAI compatibility providers
 #openai-compatibility:
diff --git a/internal/config/config.go b/internal/config/config.go
index 31920075..0e1e3966 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -157,6 +157,9 @@ type ClaudeKey struct {
 
 	// Headers optionally adds extra HTTP headers for requests sent with this key.
 	Headers map[string]string `yaml:"headers,omitempty" json:"headers,omitempty"`
+
+	// ModelBlacklist lists model IDs that should be excluded for this provider.
+	ModelBlacklist []string `yaml:"model-blacklist,omitempty" json:"model-blacklist,omitempty"`
 }
 
 // ClaudeModel describes a mapping between an alias and the actual upstream model name.
@@ -183,6 +186,9 @@ type CodexKey struct {
 
 	// Headers optionally adds extra HTTP headers for requests sent with this key.
 	Headers map[string]string `yaml:"headers,omitempty" json:"headers,omitempty"`
+
+	// ModelBlacklist lists model IDs that should be excluded for this provider.
+	ModelBlacklist []string `yaml:"model-blacklist,omitempty" json:"model-blacklist,omitempty"`
 }
 
 // GeminiKey represents the configuration for a Gemini API key,
@@ -199,6 +205,9 @@ type GeminiKey struct {
 
 	// Headers optionally adds extra HTTP headers for requests sent with this key.
 	Headers map[string]string `yaml:"headers,omitempty" json:"headers,omitempty"`
+
+	// ModelBlacklist lists model IDs that should be excluded for this provider.
+	ModelBlacklist []string `yaml:"model-blacklist,omitempty" json:"model-blacklist,omitempty"`
 }
 
 // OpenAICompatibility represents the configuration for OpenAI API compatibility
diff --git a/internal/watcher/watcher.go b/internal/watcher/watcher.go
index 0d955064..54789524 100644
--- a/internal/watcher/watcher.go
+++ b/internal/watcher/watcher.go
@@ -450,6 +450,28 @@ func computeClaudeModelsHash(models []config.ClaudeModel) string {
 	return hex.EncodeToString(sum[:])
 }
 
+func computeModelBlacklistHash(blacklist []string) string {
+	if len(blacklist) == 0 {
+		return ""
+	}
+	normalized := make([]string, 0, len(blacklist))
+	for _, entry := range blacklist {
+		if trimmed := strings.TrimSpace(entry); trimmed != "" {
+			normalized = append(normalized, strings.ToLower(trimmed))
+		}
+	}
+	if len(normalized) == 0 {
+		return ""
+	}
+	sort.Strings(normalized)
+	data, err := json.Marshal(normalized)
+	if err != nil || len(data) == 0 {
+		return ""
+	}
+	sum := sha256.Sum256(data)
+	return hex.EncodeToString(sum[:])
+}
+
 // SetClients sets the file-based clients.
 // SetClients removed
 // SetAPIKeyClients removed
@@ -838,6 +860,9 @@ func (w *Watcher) SnapshotCoreAuths() []*coreauth.Auth {
 			if base != "" {
 				attrs["base_url"] = base
 			}
+			if hash := computeModelBlacklistHash(entry.ModelBlacklist); hash != "" {
+				attrs["model_blacklist_hash"] = hash
+			}
 			addConfigHeadersToAttrs(entry.Headers, attrs)
 			a := &coreauth.Auth{
 				ID:         id,
@@ -870,6 +895,9 @@ func (w *Watcher) SnapshotCoreAuths() []*coreauth.Auth {
 			if hash := computeClaudeModelsHash(ck.Models); hash != "" {
 				attrs["models_hash"] = hash
 			}
+			if hash := computeModelBlacklistHash(ck.ModelBlacklist); hash != "" {
+				attrs["model_blacklist_hash"] = hash
+			}
 			addConfigHeadersToAttrs(ck.Headers, attrs)
 			proxyURL := strings.TrimSpace(ck.ProxyURL)
 			a := &coreauth.Auth{
@@ -899,6 +927,9 @@ func (w *Watcher) SnapshotCoreAuths() []*coreauth.Auth {
 			if ck.BaseURL != "" {
 				attrs["base_url"] = ck.BaseURL
 			}
+			if hash := computeModelBlacklistHash(ck.ModelBlacklist); hash != "" {
+				attrs["model_blacklist_hash"] = hash
+			}
 			addConfigHeadersToAttrs(ck.Headers, attrs)
 			proxyURL := strings.TrimSpace(ck.ProxyURL)
 			a := &coreauth.Auth{
diff --git a/sdk/cliproxy/service.go b/sdk/cliproxy/service.go
index 6e303ed2..0405c6ae 100644
--- a/sdk/cliproxy/service.go
+++ b/sdk/cliproxy/service.go
@@ -640,6 +640,9 @@ func (s *Service) registerModelsForAuth(a *coreauth.Auth) {
 	switch provider {
 	case "gemini":
 		models = registry.GetGeminiModels()
+		if entry := s.resolveConfigGeminiKey(a); entry != nil {
+			models = applyModelBlacklist(models, entry.ModelBlacklist)
+		}
 	case "vertex":
 		// Vertex AI Gemini supports the same model identifiers as Gemini.
 		models = registry.GetGeminiVertexModels()
@@ -653,11 +656,17 @@ func (s *Service) registerModelsForAuth(a *coreauth.Auth) {
 		cancel()
 	case "claude":
 		models = registry.GetClaudeModels()
-		if entry := s.resolveConfigClaudeKey(a); entry != nil && len(entry.Models) > 0 {
-			models = buildClaudeConfigModels(entry)
+		if entry := s.resolveConfigClaudeKey(a); entry != nil {
+			if len(entry.Models) > 0 {
+				models = buildClaudeConfigModels(entry)
+			}
+			models = applyModelBlacklist(models, entry.ModelBlacklist)
 		}
 	case "codex":
 		models = registry.GetOpenAIModels()
+		if entry := s.resolveConfigCodexKey(a); entry != nil {
+			models = applyModelBlacklist(models, entry.ModelBlacklist)
+		}
 	case "qwen":
 		models = registry.GetQwenModels()
 	case "iflow":
@@ -749,7 +758,10 @@ func (s *Service) registerModelsForAuth(a *coreauth.Auth) {
 			key = strings.ToLower(strings.TrimSpace(a.Provider))
 		}
 		GlobalModelRegistry().RegisterClient(a.ID, key, models)
+		return
 	}
+
+	GlobalModelRegistry().UnregisterClient(a.ID)
 }
 
 func (s *Service) resolveConfigClaudeKey(auth *coreauth.Auth) *config.ClaudeKey {
@@ -791,6 +803,84 @@ func (s *Service) resolveConfigClaudeKey(auth *coreauth.Auth) *config.ClaudeKey
 	return nil
 }
 
+func (s *Service) resolveConfigGeminiKey(auth *coreauth.Auth) *config.GeminiKey {
+	if auth == nil || s.cfg == nil {
+		return nil
+	}
+	var attrKey, attrBase string
+	if auth.Attributes != nil {
+		attrKey = strings.TrimSpace(auth.Attributes["api_key"])
+		attrBase = strings.TrimSpace(auth.Attributes["base_url"])
+	}
+	for i := range s.cfg.GeminiKey {
+		entry := &s.cfg.GeminiKey[i]
+		cfgKey := strings.TrimSpace(entry.APIKey)
+		cfgBase := strings.TrimSpace(entry.BaseURL)
+		if attrKey != "" && strings.EqualFold(cfgKey, attrKey) {
+			if cfgBase == "" || strings.EqualFold(cfgBase, attrBase) {
+				return entry
+			}
+			continue
+		}
+		if attrKey == "" && attrBase != "" && strings.EqualFold(cfgBase, attrBase) {
+			return entry
+		}
+	}
+	return nil
+}
+
+func (s *Service) resolveConfigCodexKey(auth *coreauth.Auth) *config.CodexKey {
+	if auth == nil || s.cfg == nil {
+		return nil
+	}
+	var attrKey, attrBase string
+	if auth.Attributes != nil {
+		attrKey = strings.TrimSpace(auth.Attributes["api_key"])
+		attrBase = strings.TrimSpace(auth.Attributes["base_url"])
+	}
+	for i := range s.cfg.CodexKey {
+		entry := &s.cfg.CodexKey[i]
+		cfgKey := strings.TrimSpace(entry.APIKey)
+		cfgBase := strings.TrimSpace(entry.BaseURL)
+		if attrKey != "" && strings.EqualFold(cfgKey, attrKey) {
+			if cfgBase == "" || strings.EqualFold(cfgBase, attrBase) {
+				return entry
+			}
+			continue
+		}
+		if attrKey == "" && attrBase != "" && strings.EqualFold(cfgBase, attrBase) {
+			return entry
+		}
+	}
+	return nil
+}
+
+func applyModelBlacklist(models []*ModelInfo, blacklist []string) []*ModelInfo {
+	if len(models) == 0 || len(blacklist) == 0 {
+		return models
+	}
+	blocked := make(map[string]struct{}, len(blacklist))
+	for _, item := range blacklist {
+		if trimmed := strings.TrimSpace(item); trimmed != "" {
+			blocked[strings.ToLower(trimmed)] = struct{}{}
+		}
+	}
+	if len(blocked) == 0 {
+		return models
+	}
+	filtered := make([]*ModelInfo, 0, len(models))
+	for _, model := range models {
+		if model == nil {
+			continue
+		}
+		if _, blockedModel := blocked[strings.ToLower(strings.TrimSpace(model.ID))]; blockedModel {
+			continue
+		}
+		filtered = append(filtered, model)
+	}
+	return filtered
+}
+
 func buildClaudeConfigModels(entry *config.ClaudeKey) []*ModelInfo {
 	if entry == nil || len(entry.Models) == 0 {
 		return nil