diff --git a/internal/agent/coordinator.go b/internal/agent/coordinator.go
index aed5624e178d80310784f5a2014b92b32afcacd8..68e83b1a63f05b20dea567fefeb41e1519a19ce7 100644
--- a/internal/agent/coordinator.go
+++ b/internal/agent/coordinator.go
@@ -268,7 +268,7 @@ func getProviderOptions(model Model, providerCfg config.ProviderConfig) fantasy.
 	switch providerCfg.Type {
 	case openai.Name, azure.Name:
 		_, hasReasoningEffort := mergedOptions["reasoning_effort"]
-		if !hasReasoningEffort && model.ModelCfg.ReasoningEffort != "" {
+		if !hasReasoningEffort && model.ModelCfg.ReasoningEffort != "" && model.CatwalkCfg.CanReason {
 			mergedOptions["reasoning_effort"] = model.ModelCfg.ReasoningEffort
 		}
 		if openai.IsResponsesModel(model.CatwalkCfg.ID) {
@@ -292,7 +292,7 @@ func getProviderOptions(model Model, providerCfg config.ProviderConfig) fantasy.
 			_, hasThink  = mergedOptions["thinking"]
 		)
 		switch {
-		case !hasEffort && model.ModelCfg.ReasoningEffort != "":
+		case !hasEffort && model.ModelCfg.ReasoningEffort != "" && model.CatwalkCfg.CanReason:
 			mergedOptions["effort"] = model.ModelCfg.ReasoningEffort
 		case !hasThink && model.ModelCfg.Think:
 			mergedOptions["thinking"] = map[string]any{"budget_tokens": 2000}
@@ -349,7 +349,7 @@ func getProviderOptions(model Model, providerCfg config.ProviderConfig) fantasy.
 		extraBody := make(map[string]any)
 
 		_, hasReasoningEffort := mergedOptions["reasoning_effort"]
-		if !hasReasoningEffort && model.ModelCfg.ReasoningEffort != "" {
+		if !hasReasoningEffort && model.ModelCfg.ReasoningEffort != "" && model.CatwalkCfg.CanReason {
 			switch providerCfg.ID {
 			case string(catwalk.InferenceProviderIoNet):
 				extraBody["reasoning"] = map[string]string{"effort": model.ModelCfg.ReasoningEffort}
diff --git a/internal/agent/coordinator_test.go b/internal/agent/coordinator_test.go
index 1dd90d91e75421f1e8a6d3e3b54f12a009643c1c..c1d5ede005e4d3f69cf9482c38d99c2ca8565d98 100644
--- a/internal/agent/coordinator_test.go
+++ b/internal/agent/coordinator_test.go
@@ -399,7 +399,7 @@ func TestGetProviderOptionsReasoningEffort(t *testing.T) {
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
 			model := Model{
-				CatwalkCfg: catwalk.Model{ID: "claude-opus-4-7"},
+				CatwalkCfg: catwalk.Model{ID: "claude-opus-4-7", CanReason: true},
 				ModelCfg: config.SelectedModel{
 					Provider:        "test",
 					ReasoningEffort: "max",