diff --git a/src/agents/pi-embedded-runner/model.ts b/src/agents/pi-embedded-runner/model.ts
index 2bd9e7b3aba..cc08d5031f2 100644
--- a/src/agents/pi-embedded-runner/model.ts
+++ b/src/agents/pi-embedded-runner/model.ts
@@ -304,6 +304,7 @@ function preserveDiscoveredTransportMetadata(params: {
     input: configuredModel?.input ?? discoveredModel.input ?? dynamicModel.input,
     compat: configuredModel?.compat ?? discoveredModel.compat ?? dynamicModel.compat,
     maxTokens: configuredModel?.maxTokens ?? discoveredModel.maxTokens ?? dynamicModel.maxTokens,
+    reasoning: configuredModel?.reasoning ?? discoveredModel.reasoning ?? dynamicModel.reasoning,
     cost: discoveredModel.cost ?? dynamicModel.cost,
     headers:
       discoveredHeaders || dynamicHeaders