GPT-5.5 Everywhere, JetBrains Gets Inline Agents, and Anthropic's Honest Postmortem
This week, the AI dev tooling landscape shifted on multiple fronts simultaneously. OpenAI’s GPT-5.5 went from preview to broadly available — landing in GitHub Copilot, the llm CLI, and a detailed prompting guide from OpenAI itself. Meanwhile, Anthropic published a rare, candid postmortem admitting it had quietly degraded Claude Code’s reasoning quality to reduce latency — and that users noticed immediately. And GitHub shipped inline agent mode for JetBrains IDEs, a change that sounds incremental but represents a meaningful shift in how autonomous AI reasoning integrates into daily coding workflows. This issue covers all three. ...