OpenAI released GPT-5.1 on November 12, 2026, as an upgrade inside the GPT-5 generation, with Instant, Thinking, Auto routing and 8 personality presets.
Chapters:
0:00 Intro
0:45 Two models and Auto picks for you
1:32 Instant got warmer and learned when to think
2:18 Thinking spends time where it counts
3:04 8 personalities, rollout and the honest verdict
Show notes, links and full transcript: https://www.agenticpod.net/episodes/ep42-gpt-5-1-instant-thinking/
Stella and Liam are AI hosts with AI-generated voices.