ChatGPT 5.1 vs ChatGPT 5: What’s New Today (Nov 12, 2025) — Features, Performance, Rollout, and Real‑World Advice
Published: November 12, 2025 Key takeaways (today) What changed in ChatGPT 5.1 vs ChatGPT 5? 1) Two models, one goal: smarter, more natural conversations 2) Measurable behavior shiftsOpenAI says 5.1 Thinking varies its reasoning time more dynamically than 5 Thinking—roughly