From 8ffc515674dbe626b643f1c4139c24d599e1b689 Mon Sep 17 00:00:00 2001
From: cthomas <caren@letta.com>
Date: Thu, 19 Feb 2026 10:49:35 -0800
Subject: [PATCH] fix: flip parallel_tool_calls setting default (#9541)

---
 fern/openapi.json      | 26 +++++++++++++-------------
 letta/schemas/model.py |  2 +-
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/fern/openapi.json b/fern/openapi.json
index 379056cd..da3d576d 100644
--- a/fern/openapi.json
+++ b/fern/openapi.json
@@ -27178,7 +27178,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
@@ -28188,7 +28188,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
@@ -28501,7 +28501,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
@@ -30344,7 +30344,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
@@ -32971,7 +32971,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
@@ -34888,7 +34888,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
@@ -34957,7 +34957,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
@@ -35026,7 +35026,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
@@ -40650,7 +40650,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
@@ -40737,7 +40737,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
@@ -45079,7 +45079,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
@@ -48010,7 +48010,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
@@ -48072,7 +48072,7 @@
             "type": "boolean",
             "title": "Parallel Tool Calls",
             "description": "Whether to enable parallel tool calling.",
-            "default": false
+            "default": true
           },
           "provider_type": {
             "type": "string",
diff --git a/letta/schemas/model.py b/letta/schemas/model.py
index ea855206..fa1c14cb 100644
--- a/letta/schemas/model.py
+++ b/letta/schemas/model.py
@@ -212,7 +212,7 @@ class ModelSettings(BaseModel):
 
     # model: str = Field(..., description="The name of the model.")
     max_output_tokens: int = Field(4096, description="The maximum number of tokens the model can generate.")
-    parallel_tool_calls: bool = Field(False, description="Whether to enable parallel tool calling.")
+    parallel_tool_calls: bool = Field(True, description="Whether to enable parallel tool calling.")
 
 
 class OpenAIReasoning(BaseModel):