diff --git a/eval/prompt-caching/run_eval.py b/eval/prompt-caching/run_eval.py
index ddef506..c545711 100644
--- a/eval/prompt-caching/run_eval.py
+++ b/eval/prompt-caching/run_eval.py
@@ -47,7 +47,7 @@ def call_agent(prompt: str, agent: str, skill_loaded: bool) -> str:
         resp = client.messages.create(
             model="claude-opus-4-7",
             max_tokens=2048,
-            temperature=0,
+            # temperature omitted: claude-opus-4-7 rejects it with a 400
             system=system,
             messages=[{"role": "user", "content": prompt}],
         )