9.22.26 | MiMo v2.6 update, importance of attention, reluctance to read unoriginal content

This is a recap of the top 10 posts on Hacker News on Sep 22, 2026.

Feel free to leave feedback on Github: https://github.com/denolfe/hacker-news-highlights

• (00:00) - Intro
• (00:19) - MiMo v2.6
• (01:22) - Attention is all you have
• (02:41) - I don't want to read what you didn't write
• (04:05) - What Sun got wrong
• (05:12) - Grok 4.7
• (06:39) - Spymarks, Not Watermarks
• (08:02) - Transformers Explained Visually
• (09:27) - NASA’s Mars Sample Return mission is dead
• (10:39) - AI coding has made CI a bottleneck, so we reworked ours to keep up
• (11:53) - Python Workers are now generally available
• (13:22) - Outro

MiMo v2.6
https://mimo.xiaomi.com/mimo-v2-6
https://news.ycombinator.com/item?id=49792730

Attention is all you have
https://alicegg.tech/2026/09/21/attention
https://news.ycombinator.com/item?id=49787726

I don't want to read what you didn't write
https://blog.colinbreck.com/i-dont-want-to-read-what-you-didnt-write/
https://news.ycombinator.com/item?id=49794330

What Sun got wrong
https://bcantrill.dtrace.org/2026/09/20/what-sun-got-wrong/
https://news.ycombinator.com/item?id=49787436

Grok 4.7
https://x.ai/news/grok-4-7
https://news.ycombinator.com/item?id=49788838

Spymarks, Not Watermarks
https://brand.io/article/spymarks/
https://news.ycombinator.com/item?id=49794615

Transformers Explained Visually
https://poloclub.github.io/transformer-explainer/
https://news.ycombinator.com/item?id=49792342

NASA’s Mars Sample Return mission is dead
https://www.science.org/content/article/nasa-s-mars-sample-return-mission-dead
https://news.ycombinator.com/item?id=49791939

AI coding has made CI a bottleneck, so we reworked ours to keep up
https://linear.app/now/ci-bottleneck-reworked
https://news.ycombinator.com/item?id=49792067

Python Workers are now generally available
https://blog.cloudflare.com/python-workers-ga/
https://news.ycombinator.com/item?id=49787142