Update sample configs for OpenAI (gpt-5) to specify max_completion_tokens, not max_response_tokens

Fixup for b43f61f5ff

etc/app/config.yml.dist

@@ -79,10 +79,10 @@ agents:
     #       model_id: gpt-5
     #       prompt: "You are a brief, but helpful bot called {{ baibot_name }} powered by the {{ baibot_model_id }} model. The date/time of this conversation's start is: {{ baibot_conversation_start_time_utc }}."
     #       temperature: 1.0
-    #       max_response_tokens: 16384
+    #       max_response_tokens: ~
     #       # Reasoning models need to use `max_completion_tokens` instead of `max_response_tokens`.
-    #       max_completion_tokens: ~
-    #       max_context_tokens: 128000
+    #       max_completion_tokens: 128000
+    #       max_context_tokens: 400000
     #     speech_to_text:
     #       model_id: whisper-1
     #     text_to_speech:

src/agent/provider/openai/config.rs

@@ -72,9 +72,9 @@ impl Default for TextGenerationConfig {
             model_id: default_text_model_id(),
             prompt: Some(default_prompt().to_owned()),
             temperature: super::super::default_temperature(),
-            max_response_tokens: Some(16_384),
-            max_completion_tokens: None,
-            max_context_tokens: 128_000,
+            max_response_tokens: None,
+            max_completion_tokens: Some(128_000),
+            max_context_tokens: 400_000,
         }
     }
 }