AI Daily for 11 September: DeepSeek V4.1 Flash, Unpublished Math Trust, OpenAI Training Setting, Cognition SWE-2

AI Daily: 5-Minute, best of Hacker News · Sep 11, 2026 · 5m

AI Daily for 11 September recaps 5 major AI Hacker News stories, moving through deepseek v4.1 flash, unpublished math trust, openai training setting, cognition swe-2.

Chapters

00:00:00 — Intro

00:00:19 — DeepSeek V4.1 Flash

00:01:19 — Unpublished Math Trust

00:02:22 — OpenAI Training Setting

00:03:07 — Cognition SWE-2

00:04:29 — Another Stolen Proof

00:05:27 — Closing

1. DeepSeek V4.1 Flash

The next story is DeepSeek V4.1 Flash, a 552-billion-parameter mixture-of-experts model that DeepSeek presents as smarter, faster, and more efficient, with native visual understanding and a KV cache…