diff --git a/packages/core/lib/v3/llm/aisdk.ts b/packages/core/lib/v3/llm/aisdk.ts
index cd9bbdaa7..b7a317867 100644
--- a/packages/core/lib/v3/llm/aisdk.ts
+++ b/packages/core/lib/v3/llm/aisdk.ts
@@ -135,9 +135,7 @@ export class AISdkClient extends LLMClient {
     const isGPT5 = this.model.modelId.includes("gpt-5");
     const isCodex = this.model.modelId.includes("codex");
     const usesLowReasoningEffort =
-      (this.model.modelId.includes("gpt-5.1") ||
-        this.model.modelId.includes("gpt-5.2")) &&
-      !isCodex;
+      this.model.modelId.includes("gpt-5.") && !isCodex;
     // Kimi models only support temperature=1
     const isKimi = this.model.modelId.includes("kimi");
     const temperature = isKimi ? 1 : options.temperature;