Gemini-2.5-pro API generated my personal name in a response despite the name never appearing in the conversation context. Notable behavioral anomaly: response pattern changed from extended thinking to direct response when the privacy leak occurred.
Technical Details:
- Model: gemini-2.5-pro
- Platform: Lobe-Chat → Gemini API
- Conversation length: ~7,000 tokens
- System prompt: None set
- Context verification: Manually confirmed my name never appeared in conversation history
- Session: Clean session, no prior conversations
- Thinking budget: -1
Critical Behavioral Pattern:
- All previous AI responses: Used extended thinking mode
- Response containing my name: No extended thinking - direct response only
Observed Behavior:
The model spontaneously included my English name in a response without any apparent source in the provided context, and simultaneously changed from its established extended thinking pattern to direct response mode.