diff --git a/backend/pkg/providers/openaicompat_adaptive_test.go b/backend/pkg/providers/openaicompat_adaptive_test.go
new file mode 100644
index 00000000..a5adeb1b
--- /dev/null
+++ b/backend/pkg/providers/openaicompat_adaptive_test.go
@@ -0,0 +1,45 @@
+package providers
+
+import (
+	"testing"
+
+	"pentagi/pkg/providers/deepseek"
+	"pentagi/pkg/providers/glm"
+	"pentagi/pkg/providers/kimi"
+	"pentagi/pkg/providers/minimax"
+	"pentagi/pkg/providers/pconfig"
+	"pentagi/pkg/providers/qwen"
+)
+
+func TestOpenAICompatProvidersDoNotUseAdaptiveThinking(t *testing.T) {
+	t.Parallel()
+
+	providers := []struct {
+		name   string
+		config func() (*pconfig.ProviderConfig, error)
+		models func() (pconfig.ModelsConfig, error)
+	}{
+		{"qwen", qwen.DefaultProviderConfig, qwen.DefaultModels},
+		{"glm", glm.DefaultProviderConfig, glm.DefaultModels},
+		{"deepseek", deepseek.DefaultProviderConfig, deepseek.DefaultModels},
+		{"kimi", kimi.DefaultProviderConfig, kimi.DefaultModels},
+		{"minimax", minimax.DefaultProviderConfig, minimax.DefaultModels},
+	}
+
+	for _, p := range providers {
+		cfg, err := p.config()
+		if err != nil {
+			t.Fatalf("%s: DefaultProviderConfig() error: %v", p.name, err)
+		}
+		models, err := p.models()
+		if err != nil {
+			t.Fatalf("%s: DefaultModels() error: %v", p.name, err)
+		}
+
+		for _, opt := range pconfig.AllAgentTypes {
+			if cfg.UsesAdaptiveThinking(models, opt) {
+				t.Errorf("%s/%s resolves to adaptive thinking, but the openaicompat transport never emits it (M7): adaptive thinking is Anthropic/Bedrock-only", p.name, opt)
+			}
+		}
+	}
+}