diff --git a/verifiers/v1/clients/base.py b/verifiers/v1/clients/base.py
index 41317f430d..586137668d 100644
--- a/verifiers/v1/clients/base.py
+++ b/verifiers/v1/clients/base.py
@@ -7,8 +7,9 @@
 
 from verifiers.v1.configs.client import BaseClientConfig, resolve_api_key
 
-# Mirrors the OAI SDK defaults
-DEFAULT_TIMEOUT = httpx.Timeout(connect=5.0, read=600.0, write=600.0, pool=600.0)
+# No read timeout: agentic completions are slow and the rollout timeout is the real
+# backstop. The connect bound stays so an unreachable endpoint still fails fast.
+DEFAULT_TIMEOUT = httpx.Timeout(connect=5.0, read=None, write=None, pool=None)
 DEFAULT_LIMITS = httpx.Limits(max_connections=1000, max_keepalive_connections=100)
 MAX_RETRIES = 0
 """No client-side retries: failures surface to the harness SDK and the trace instead of