ChatGPT 5.1 vs Gemini 2.5: What Changed Today (Nov 12, 2025) — And Which AI Should You Use Now
Updated: November 12, 2025 TL;DR What’s new today (Nov 12, 2025) OpenAI: ChatGPT 5.1 launches. OpenAI introduced two refreshed models—GPT‑5.1 Instant and GPT‑5.1 Thinking—aimed at making replies feel more natural while improving reliability on both simple and complex tasks. OpenAI
