X is the best way I’ve found to keep up with AI. I like tweets throughout the week, filtering for things I think are actually worth knowing. I use Claude Code to pull those likes automatically and help me turn them into this post (here’s how the pipeline works). This week: 148 tweets liked, filtered down to what’s below. Check out the previous roundup (May 2) if you missed it. AI for Everyone GPT-5.5 Instant Becomes the ChatGPT Default for Everyone (5 mentions) OpenAI started rolling GPT-5.5 Instant on May 5 as the default model for every ChatGPT user (also available in the API as gpt-5.5-chat-latest). The pitch is meaningful improvements in factuality, especially in medicine, law, and finance, plus a noticeable shift toward shorter, less padded answers. The memory update is the part worth digging into: ChatGPT can now use your saved memories, past chats, files, and a connected Gmail to personalize responses, and a new “memory sources” panel shows exactly what it pulled from so you can edit or delete entries. A full-duplex voice mode is coming, where the model can listen and speak at the same time. The companion OpenRouter cost analysis is the catch: short-prompt workloads are about 92% more expensive on GPT-5.5 than GPT-5.4. (source: @OpenAI, @OpenAI, @OpenAI) ...









