9.23.26 | Claude Opus 5.5, GPT-6 Sol and Luna, OpenAI GPT–6 Astra decrypts Enigma message

This is a recap of the top 10 posts on Hacker News on Sep 23, 2026.

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

• (00:00) - Intro
• (00:19) - Claude Opus 5.5
• (01:44) - GPT-6 Sol and Luna
• (03:19) - OpenAI GPT–6 Astra breaks Enigma message that has resisted solution since 2005
• (04:40) - Pentagon says overreliance on AI contributed to missile strike on Iran school
• (05:50) - 'We hacked the FBI:' Hackers say they have data on all FBI employees
• (06:48) - How did AMD Ryzen get 50% faster in two years?
• (08:03) - Microsoft killed FoxPro in 2007. Anyway, here's FoxPro revived
• (09:20) - OpenAI is well positioned to fast-follow Jev
• (10:48) - Claude Opus 5.5 Intelligence, Performance and Price Analysis (Max)
• (12:07) - SAML: A fractal of bad design
• (13:19) - Outro

Claude Opus 5.5
https://www.anthropic.com/claude-opus-5-5
https://news.ycombinator.com/item?id=49803892

GPT-6 Sol and Luna
https://openai.com/index/introducing-gpt-6-sol-and-luna/
https://news.ycombinator.com/item?id=49805509

OpenAI GPT–6 Astra breaks Enigma message that has resisted solution since 2005
https://www.cryptocellar.org/bgac/the-mvueh-break.html
https://news.ycombinator.com/item?id=49801324

Pentagon says overreliance on AI contributed to missile strike on Iran school
https://www.bloomberg.com/graphics/2026-iran-school-attack/
https://news.ycombinator.com/item?id=49806430

'We hacked the FBI:' Hackers say they have data on all FBI employees
https://www.404media.co/we-hacked-the-fbi-hackers-say-they-have-data-on-all-fbi-employees/
https://news.ycombinator.com/item?id=49805278

How did AMD Ryzen get 50% faster in two years?
https://lemire.me/blog/2026/09/18/how-did-amd-ryzen-get-50-faster-in-two-years/
https://news.ycombinator.com/item?id=49758709

Microsoft killed FoxPro in 2007. Anyway, here's FoxPro revived
https://foxscript.org/
https://news.ycombinator.com/item?id=49808023

OpenAI is well positioned to fast-follow Jev
https://arcturus-labs.com/blog/2026/09/21/will-openai-eat-jevs-lunch/
https://news.ycombinator.com/item?id=49802161

Claude Opus 5.5 Intelligence, Performance and Price Analysis (Max)
https://artificialanalysis.ai/models/claude-opus-5-5
https://news.ycombinator.com/item?id=49804316

SAML: A fractal of bad design
https://blog.trailofbits.com/2026/09/21/saml-a-fractal-of-bad-design/
https://news.ycombinator.com/item?id=49806335