✅ GPT-5.6 Sol costs less to run — the strongest ChatGPT model in the picker dropped to $4 per 1M input tokens and $20 per 1M output: 20% off input, 33% off output, straight through to you. Its maker calls this a promotional rate held at least until 21 November — the Pricing panel always shows what you are actually billed, so if it moves, you will see it there the same day.

✅ Formulas look like formulas — LaTeX in a reply is typeset properly: $$…$$, \[…\] and inline $…$ all render as real mathematics, in chat and on shared pages alike. Ask for a derivation, a matrix or a bit of physics and you get something you can read. Prices in dollars stay plain text, as you would expect.

✅ AI settings save themselves — the Save button is gone from AI settings: pick a model or a preset and it is stored right away. Nothing to remember, nothing to lose by navigating away.

✅ Image settings follow the model you pick — choose a different image model and Ratio, Resolution and Quality snap to what that model actually supports; pick the same one again and your tuning stays as you set it, 4K included.

✅ Around the app — the model dropdown now has a ⚙️ Settings entry at the bottom that takes you straight to AI settings, and on a phone the Settings page gets a round ✕ close button within thumb reach at the bottom-left.