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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 5.5https://www.anthropic.com/claude-opus-5-5https://news.ycombinator.com/item?id=49803892GPT-6 Sol and Lunahttps://openai.com/index/introducing-gpt-6-sol-and-luna/https://news.ycombinator.com/item?id=49805509OpenAI GPT–6 Astra breaks Enigma message that has resisted solution since 2005https://www.cryptocellar.org/bgac/the-mvueh-break.htmlhttps://news.ycombinator.com/item?id=49801324Pentagon says overreliance on AI contributed to missile strike on Iran schoolhttps://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 employeeshttps://www.404media.co/we-hacked-the-fbi-hackers-say-they-have-data-on-all-fbi-employees/https://news.ycombinator.com/item?id=49805278How 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=49758709Microsoft killed FoxPro in 2007. Anyway, here's FoxPro revivedhttps://foxscript.org/https://news.ycombinator.com/item?id=49808023OpenAI is well positioned to fast-follow Jevhttps://arcturus-labs.com/blog/2026/09/21/will-openai-eat-jevs-lunch/https://news.ycombinator.com/item?id=49802161Claude Opus 5.5 Intelligence, Performance and Price Analysis (Max)https://artificialanalysis.ai/models/claude-opus-5-5https://news.ycombinator.com/item?id=49804316SAML: A fractal of bad designhttps://blog.trailofbits.com/2026/09/21/saml-a-fractal-of-bad-design/https://news.ycombinator.com/item?id=49806335 What is Hacker News Highlights? Daily overview of the Top 10 Hacker News posts. Post and comment summarization by AI.