diff --git a/cmd/config/opencode_test.go b/cmd/config/opencode_test.go
index 9e4402e4f..552435453 100644
--- a/cmd/config/opencode_test.go
+++ b/cmd/config/opencode_test.go
@@ -3,6 +3,8 @@ package config
 import (
 	"encoding/json"
 	"fmt"
+	"net/http"
+	"net/http/httptest"
 	"os"
 	"path/filepath"
 	"testing"
@@ -657,6 +659,54 @@ func TestOpenCodeEdit_CloudModelLimitStructure(t *testing.T) {
 	}
 }
 
+func TestOpenCodeEdit_BackfillsCloudModelLimitOnExistingEntry(t *testing.T) {
+	o := &OpenCode{}
+	tmpDir := t.TempDir()
+	setTestHome(t, tmpDir)
+
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path == "/api/show" {
+			fmt.Fprintf(w, `{"capabilities":[],"model_info":{},"remote_model":"glm-5"}`)
+			return
+		}
+		w.WriteHeader(http.StatusNotFound)
+	}))
+	defer srv.Close()
+	t.Setenv("OLLAMA_HOST", srv.URL)
+
+	configDir := filepath.Join(tmpDir, ".config", "opencode")
+	configPath := filepath.Join(configDir, "opencode.json")
+	os.MkdirAll(configDir, 0o755)
+	os.WriteFile(configPath, []byte(`{
+		"provider": {
+			"ollama": {
+				"models": {
+					"glm-5:cloud": {
+						"name": "glm-5:cloud",
+						"_launch": true
+					}
+				}
+			}
+		}
+	}`), 0o644)
+
+	if err := o.Edit([]string{"glm-5:cloud"}); err != nil {
+		t.Fatal(err)
+	}
+
+	entry := readOpenCodeModel(t, configPath, "glm-5:cloud")
+	limit, ok := entry["limit"].(map[string]any)
+	if !ok {
+		t.Fatal("cloud model limit was not added on re-edit")
+	}
+	if limit["context"] != float64(202_752) {
+		t.Errorf("context = %v, want 202752", limit["context"])
+	}
+	if limit["output"] != float64(131_072) {
+		t.Errorf("output = %v, want 131072", limit["output"])
+	}
+}
+
 func TestLookupCloudModelLimit(t *testing.T) {
 	tests := []struct {
 		name        string
diff --git a/cmd/config/pi.go b/cmd/config/pi.go
index e40b50db4..f2ae0c5f7 100644
--- a/cmd/config/pi.go
+++ b/cmd/config/pi.go
@@ -107,7 +107,8 @@ func (p *Pi) Edit(models []string) error {
 
 	// Build new models list:
 	// 1. Keep user-managed models (no _launch marker) - untouched
-	// 2. Keep ollama-managed models (_launch marker) that are still selected
+	// 2. Keep ollama-managed models (_launch marker) that are still selected,
+	//    except stale cloud entries that should be rebuilt below
 	// 3. Add new ollama-managed models
 	var newModels []any
 	for _, m := range existingModels {
@@ -117,7 +118,13 @@ func (p *Pi) Edit(models []string) error {
 				if !isPiOllamaModel(modelObj) {
 					newModels = append(newModels, m)
 				} else if selectedSet[id] {
-					// Ollama-managed and still selected - keep it
+					// Rebuild stale managed cloud entries so createConfig refreshes
+					// the whole entry instead of patching it in place.
+					if !hasContextWindow(modelObj) {
+						if _, ok := lookupCloudModelLimit(id); ok {
+							continue
+						}
+					}
 					newModels = append(newModels, m)
 					selectedSet[id] = false
 				}
@@ -199,6 +206,19 @@ func isPiOllamaModel(cfg map[string]any) bool {
 	return false
 }
 
+func hasContextWindow(cfg map[string]any) bool {
+	switch v := cfg["contextWindow"].(type) {
+	case float64:
+		return v > 0
+	case int:
+		return v > 0
+	case int64:
+		return v > 0
+	default:
+		return false
+	}
+}
+
 // createConfig builds Pi model config with capability detection
 func createConfig(ctx context.Context, client *api.Client, modelID string) map[string]any {
 	cfg := map[string]any{
diff --git a/cmd/config/pi_test.go b/cmd/config/pi_test.go
index e6176d415..1ca572e81 100644
--- a/cmd/config/pi_test.go
+++ b/cmd/config/pi_test.go
@@ -192,6 +192,48 @@ func TestPiEdit(t *testing.T) {
 		}
 	})
 
+	t.Run("rebuilds stale existing managed cloud model", func(t *testing.T) {
+		cleanup()
+		os.MkdirAll(configDir, 0o755)
+
+		existingConfig := `{
+			"providers": {
+				"ollama": {
+					"baseUrl": "http://localhost:11434/v1",
+					"api": "openai-completions",
+					"apiKey": "ollama",
+					"models": [
+						{"id": "glm-5:cloud", "_launch": true, "legacyField": "stale"}
+					]
+				}
+			}
+		}`
+		if err := os.WriteFile(configPath, []byte(existingConfig), 0o644); err != nil {
+			t.Fatal(err)
+		}
+
+		if err := pi.Edit([]string{"glm-5:cloud"}); err != nil {
+			t.Fatalf("Edit() error = %v", err)
+		}
+
+		cfg := readConfig()
+		providers := cfg["providers"].(map[string]any)
+		ollama := providers["ollama"].(map[string]any)
+		modelsArray := ollama["models"].([]any)
+		modelEntry := modelsArray[0].(map[string]any)
+
+		if modelEntry["contextWindow"] != float64(202_752) {
+			t.Errorf("contextWindow = %v, want 202752", modelEntry["contextWindow"])
+		}
+		input, ok := modelEntry["input"].([]any)
+		if !ok || len(input) != 1 || input[0] != "text" {
+			t.Errorf("input = %v, want [text]", modelEntry["input"])
+		}
+		if _, ok := modelEntry["legacyField"]; ok {
+			t.Error("legacyField should be removed when stale managed cloud entry is rebuilt")
+		}
+	})
+
 	t.Run("replaces old models with new ones", func(t *testing.T) {
 		cleanup()
 		os.MkdirAll(configDir, 0o755)