Daily briefs

What happened in AI each day, read and checked against the sources.

• Mistral previewed Large 4, a 1 trillion parameter model, with open weights due October
  Tuesday, 6 October 2026
  Mistral AI opened a preview API for Mistral Large 4, a 1 trillion parameter multimodal model, and says open weights will follow by the end of October.
• David Robinson left OpenAI, then criticized its pace in The Atlantic
  Friday, 2 October 2026
  David Robinson left OpenAI and, the next day, published an essay in The Atlantic that criticizes the company's pace.
• Claude Code added mods, FLUX 3 Image added bounding-box control, and Suno launched Speech
  Thursday, 1 October 2026
  Claude Code gained "mods" written as small TypeScript functions, Black Forest Labs' FLUX 3 Image gained bounding-box layout control, and Suno released Speech in beta.
• Google released Gemini 4 Argon to cyber defenders first; OpenAI disrupted a distillation campaign
  Wednesday, 30 September 2026
  Google released Gemini 4 Argon first to vetted cyber defenders, the third lab to stage a top model's release around cyber risk, and OpenAI said it disrupted a campaign to copy its models' reasoning.
• OpenAI launched dots assistants, and Anthropic found open GLM-5.3 near Mythos on exploits
  Tuesday, 29 September 2026
  OpenAI's DevDay introduced "dots", persistent assistants with their own cloud computer, and GPT-6.1 Sol claimed near-Astra results at a fifth of the price. Anthropic reported that Zhipu's open-weights GLM-5.3 can now…
• Anthropic released Claude Sonnet 5.5, and AMD agreed to buy World Labs
  Monday, 28 September 2026
  Anthropic released Claude Sonnet 5.5 at $2/$10 per million tokens, scoring 70.6% on Terminal-Bench 4.0, and AMD agreed to buy Fei-Fei Li's World Labs in a deal reported at about $8.2 billion in stock.