Fix deepseek model max_tokens validation error

pkg/providers/factory.go

@@ -217,7 +217,9 @@ func resolveProviderSelection(cfg *config.Config) (providerSelection, error) {
 			strings.HasPrefix(model, "openai/") ||
 			strings.HasPrefix(model, "meta-llama/") ||
 			strings.HasPrefix(model, "deepseek/") ||
+			strings.HasPrefix(model, "deepseek-ai/") ||
 			strings.HasPrefix(model, "google/"):
+
 			sel.apiKey = cfg.Providers.OpenRouter.APIKey
 			sel.proxy = cfg.Providers.OpenRouter.Proxy
 			if cfg.Providers.OpenRouter.APIBase != "" {
@@ -279,7 +281,35 @@ func resolveProviderSelection(cfg *config.Config) (providerSelection, error) {
 			if sel.apiBase == "" {
 				sel.apiBase = "https://api.groq.com/openai/v1"
 			}
+		
+		case (strings.Contains(lowerModel, "deepseek") || strings.HasPrefix(model, "deepseek/") || strings.HasPrefix(model, "deepseek-ai/")) && cfg.Providers.DeepSeek.APIKey != "":
+
+			sel.apiKey = cfg.Providers.DeepSeek.APIKey
+
+			sel.apiBase = cfg.Providers.DeepSeek.APIBase
+
+			sel.proxy = cfg.Providers.DeepSeek.Proxy
+
+			if sel.apiBase == "" {
+
+				sel.apiBase = "https://api.deepseek.com/v1"
+
+			}
+
+			// Keep original model name logic for backward compatibility
+
+			if !strings.HasPrefix(model, "deepseek/") && !strings.HasPrefix(model, "deepseek-ai/") {
+
+				if model != "deepseek-chat" && model != "deepseek-reasoner" {
+
+					sel.model = "deepseek-chat"
+
+				}
+
+			}
+
 		case (strings.Contains(lowerModel, "nvidia") || strings.HasPrefix(model, "nvidia/")) && cfg.Providers.Nvidia.APIKey != "":
+
 			sel.apiKey = cfg.Providers.Nvidia.APIKey
 			sel.apiBase = cfg.Providers.Nvidia.APIBase
 			sel.proxy = cfg.Providers.Nvidia.Proxy

pkg/providers/factory_provider.go

@@ -55,6 +55,13 @@ func ExtractProtocol(model string) (protocol, modelID string) {
 // It uses the protocol prefix in the Model field to determine which provider to create.
 // Supported protocols: openai, litellm, anthropic, antigravity, claude-cli, codex-cli, github-copilot
 // Returns the provider, the model ID (without protocol prefix), and any error.
+// ExtractProtocol extracts the protocol prefix and model identifier from a model string.
+// If no prefix is specified, it defaults to "openai".
+// Examples:
+//   - "openai/gpt-4o" -> ("openai", "gpt-4o")
+//   - "anthropic/claude-sonnet-4.6" -> ("anthropic", "claude-sonnet-4.6")
+//   - "gpt-4o" -> ("openai", "gpt-4o")  // default protocol
+func ExtractProtocol(model string) (protocol, modelID string) {
 func CreateProviderFromConfig(cfg *config.ModelConfig) (LLMProvider, string, error) {
 	if cfg == nil {
 		return nil, "", fmt.Errorf("config is nil")
@@ -84,12 +91,17 @@ func CreateProviderFromConfig(cfg *config.ModelConfig) (LLMProvider, string, err
 		if apiBase == "" {
 			apiBase = getDefaultAPIBase(protocol)
 		}
+		// For Ollama models, default to higher timeout if none specified
+		requestTimeout := cfg.RequestTimeout
+		if protocol == "ollama" && requestTimeout <= 0 {
+			requestTimeout = 300 // Ollama models often need more time, default to 300 seconds
+		}
 		return NewHTTPProviderWithMaxTokensFieldAndRequestTimeout(
 			cfg.APIKey,
 			apiBase,
 			cfg.Proxy,
 			cfg.MaxTokensField,
-			cfg.RequestTimeout,
+            requestTimeout,
 		), modelID, nil
 
 	case "litellm", "openrouter", "groq", "zhipu", "gemini", "nvidia",
@@ -103,12 +115,17 @@ func CreateProviderFromConfig(cfg *config.ModelConfig) (LLMProvider, string, err
 		if apiBase == "" {
 			apiBase = getDefaultAPIBase(protocol)
 		}
+		// For Ollama models, default to higher timeout if none specified
+		requestTimeout := cfg.RequestTimeout
+		if protocol == "ollama" && requestTimeout <= 0 {
+			requestTimeout = 300 // Ollama models often need more time, default to 300 seconds
+		}
 		return NewHTTPProviderWithMaxTokensFieldAndRequestTimeout(
 			cfg.APIKey,
 			apiBase,
 			cfg.Proxy,
 			cfg.MaxTokensField,
-			cfg.RequestTimeout,
+            requestTimeout,
 		), modelID, nil
 
 	case "anthropic":
@@ -128,12 +145,17 @@ func CreateProviderFromConfig(cfg *config.ModelConfig) (LLMProvider, string, err
 		if cfg.APIKey == "" {
 			return nil, "", fmt.Errorf("api_key is required for anthropic protocol (model: %s)", cfg.Model)
 		}
+		// For Ollama models, default to higher timeout if none specified
+		requestTimeout := cfg.RequestTimeout
+		if protocol == "ollama" && requestTimeout <= 0 {
+			requestTimeout = 300 // Ollama models often need more time, default to 300 seconds
+		}
 		return NewHTTPProviderWithMaxTokensFieldAndRequestTimeout(
 			cfg.APIKey,
 			apiBase,
 			cfg.Proxy,
 			cfg.MaxTokensField,
-			cfg.RequestTimeout,
+            requestTimeout,
 		), modelID, nil
 
 	case "antigravity":

pkg/providers/factory_test.go

@@ -179,10 +179,65 @@ func TestResolveProviderSelection(t *testing.T) {
 			setup: func(cfg *config.Config) {
 				cfg.Agents.Defaults.Model = "openrouter/auto"
 			},
-			wantErrSubstr: "no API key configured for provider",
+			{
+
+				name: "deepseek-ai model with DeepSeek API key uses DeepSeek API",
+
+				setup: func(cfg *config.Config) {
+
+					cfg.Agents.Defaults.Model = "deepseek-ai/DeepSeek-V3.2"
+
+					cfg.Providers.DeepSeek.APIKey = "deepseek-key"
+
+					cfg.Providers.DeepSeek.APIBase = "https://api.deepseek.com/v1"
+
 				},
+
+				wantType:    providerTypeHTTPCompat,
+
+				wantAPIBase: "https://api.deepseek.com/v1",
+
+			},
+
+			{
+
+				name: "deepseek-ai prefix model routes to DeepSeek when key configured",
+
+				setup: func(cfg *config.Config) {
+
+					cfg.Agents.Defaults.Model = "deepseek-ai/deepseek-coder"
+
+					cfg.Providers.DeepSeek.APIKey = "deepseek-key"
+
+				},
+
+				wantType:    providerTypeHTTPCompat,
+
+				wantAPIBase: "https://api.deepseek.com/v1",
+
+			},
+
+			{
+
+				name: "deepseek model still works for backward compatibility",
+
+				setup: func(cfg *config.Config) {
+
+					cfg.Agents.Defaults.Model = "deepseek/deepseek-chat"
+
+					cfg.Providers.DeepSeek.APIKey = "deepseek-key"
+
+				},
+
+				wantType:    providerTypeHTTPCompat,
+
+				wantAPIBase: "https://api.deepseek.com/v1",
+
+			},
+
 }
 
+
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			cfg := config.DefaultConfig()

pkg/providers/openai_compat/provider.go

@@ -137,8 +137,21 @@ func (p *Provider) Chat(
 				fieldName = "max_tokens"
 			}
 		}
+		// Validate max_tokens range for deepseek model
+		if strings.Contains(strings.ToLower(model), "deepseek") {
+			// Clamp max_tokens to the valid range [1, 8192]
+			adjustedMaxTokens := maxTokens
+			if maxTokens > 8192 {
+				adjustedMaxTokens = 8192
+			}
+			if maxTokens < 1 {
+				adjustedMaxTokens = 1
+			}
+			requestBody[fieldName] = adjustedMaxTokens
+		} else {
 			requestBody[fieldName] = maxTokens
 		}
+	}
 
 	if temperature, ok := asFloat(options["temperature"]); ok {
 		lowerModel := strings.ToLower(model)