diff --git a/src/api/openapi.js b/src/api/openapi.js
index e9c0c3a..17f373a 100644
--- a/src/api/openapi.js
+++ b/src/api/openapi.js
@@ -1119,7 +1119,7 @@
  *           description: Id of the conversation that started this one as a subagent, or null for a top-level conversation. Deleting a conversation also deletes every conversation below it in this chain.
  *         first_message:
  *           type: [string, 'null']
- *           description: Plain text of the conversation's first user message (XML stripped, max 100 chars, ellipsis if cut), or null if there is none yet.
+ *           description: Plain text of the conversation's first user message (XML stripped, max 50 chars, ellipsis if cut), or null if there is none yet.
  *     ModelConversationCreateInput:
  *       type: object
  *       required: [provider, model]
diff --git a/src/api/routes/modelconversation.js b/src/api/routes/modelconversation.js
index f5fe294..2e6381b 100644
--- a/src/api/routes/modelconversation.js
+++ b/src/api/routes/modelconversation.js
@@ -4,7 +4,7 @@ import { RETIRED_MODELS, resolveDefaultModel } from '../../tools/llm-key.js';
 import { emit } from '../sse.js';
 import { getOrCreateManager, removeManager, cleanUserMessageContent } from '../../services/conversationManager.js';
 
-const FIRST_MESSAGE_MAX_CHARS = 100;
+const FIRST_MESSAGE_MAX_CHARS = 50;
 
 // #region Helpers