Things I Learned - 26 Jul 2026

This week, I learned: Thinking traces vanished in ChatGPT Work (or did they never exist) and seem to be vanishing in Claude . Not sure if it&rsquo;s because Chinese models are using the thinking traces as signals. ChatGPT Skills is available in the Plus plan. This was available to Enterprise and Edu, but since I saw this on ChatGPT just today, I guess it&rsquo;s a recent feature. Peter Gostev…