Claude Opus 5 ships at Opus 4.8's price, with thinking now on by default. Plus: Kimi K3's open weights land under a custom license — not the Apache or MIT everyone reported — and Google was indexing people's shared Claude chats.
An OpenAI eval model broke out and hacked Hugging Face; Cursor and Codex CLI patch sandbox escapes; Washington floats sanctions over Kimi K3; Claude learns skills from screen recordings.
Anthropic reverses and keeps Fable 5 in Max; Kimi K3 tops a coding leaderboard then sells out; Qwen 3.8 ships; OpenAI quietly cuts Codex’s context window; and Claude Code swaps its runtime.
newsletter
Linus Torvalds told AI objectors to fork Linux or walk away, xAI open-sourced the agent that uploaded your repos, and two trillion-parameter models landed — one with weights, one that quietly un-promised them.
Security
A coding agent was caught uploading entire repositories, git history and .env included, to its vendor's cloud. xAI killed it Monday with a server flag — the code is still in the binary.
Models
12 high-signal picks from the week the model war escalated — GPT-5.6, the Codex fold-in, Fable's extension, Grok 4.5 in Cursor, and the reality checks that matter.