diff --git a/src/parallel/_constants.py b/src/parallel/_constants.py
index 9025b1f..248de45 100644
--- a/src/parallel/_constants.py
+++ b/src/parallel/_constants.py
@@ -5,6 +5,8 @@
 RAW_RESPONSE_HEADER = "X-Stainless-Raw-Response"
 OVERRIDE_CAST_TO_HEADER = "____stainless_override_cast_to"
 
+# default timeout for execution requests which wait for results is 1 hour.
+DEFAULT_EXECUTE_TIMEOUT_SECONDS = 3600
 # default timeout for http requests is 10 minutes.
 DEFAULT_TIMEOUT_SECONDS = 600
 DEFAULT_TIMEOUT = httpx.Timeout(timeout=DEFAULT_TIMEOUT_SECONDS, connect=5.0)
diff --git a/src/parallel/lib/_time.py b/src/parallel/lib/_time.py
index c600d70..80a2306 100644
--- a/src/parallel/lib/_time.py
+++ b/src/parallel/lib/_time.py
@@ -5,7 +5,7 @@
 import httpx
 
 from .._types import NotGiven
-from .._constants import DEFAULT_TIMEOUT_SECONDS
+from .._constants import DEFAULT_EXECUTE_TIMEOUT_SECONDS
 from .._exceptions import APIStatusError, APITimeoutError
 from .._utils._utils import is_given
 
@@ -19,7 +19,7 @@ def prepare_timeout_float(timeout: Union[float, httpx.Timeout, None, NotGiven])
         timeout = timeout.read
 
     if not is_given(timeout) or timeout is None:
-        return DEFAULT_TIMEOUT_SECONDS
+        return DEFAULT_EXECUTE_TIMEOUT_SECONDS
 
     return timeout