Sottiaux's triple: the launch (23309 likes, top of the day): 'GPT-6 Sol and Luna are out. Not only are they a very significant improvement across the board, but also in writing and general "you know when you try it" quality. We are also permanently reducing the API price by 50% making both of them viable for a ton of new usecases… And one more thing. We are loading a banked reset into all accounts of our Plus, Pro and Business users. Let's go'; the efficiency note (12590): 'We have been focusing on efficiency and intelligence for all. Very proud of the team. Only possible when you have incredible models at the top end of the capability'; and the tease (6045): 'Maybe our cutest launch so far. But still packing the biggest punch.' Levie's read (655): 'The rate at which the cost per task drops in AI is unlike any other type of technology in history. And every time the cost of AI drops, the use-cases you can deploy agents against dramatically increase. This is Jevons paradox applied to agents.' Altman's trio: the correction (855): 'argh i meant VOICE not video :( sorry to dissapoint'; the startups note (3675); and the tribute to Michelle (2124): 'openai is so, so lucky… people will be quite pleased to see what she + team have cooking next!'

Cherny's triple: the HAProxy race (6778 likes): 'Opus 5.5 is a really good model. It's been my daily driver the last few weeks. We had Opus 5.5 and Fable 5.1 each port HAProxy from C to Rust. Both passed nearly all of HAProxy's tests, but Opus 5.5 finished in 9.5 hours compared to Fable 5.1's 12 hours, and for 51% less cost'; the formal verification (3324): 'I used Opus 5.5 to formally verify the Claude Agent SDK using Lean. A couple short prompts = 16 PRs fixing various bugs and race conditions… I don't know either language well, but Claude is excellent at both'; and the infographic (117). Cat Wu's announcement (1308): 'Claude Opus 5.5 is now the default model in Claude Code and the Claude app, including Cowork, for Pro, Max, and Team plans… Your rate limits will go 25% further on Opus 5.5 compared to Opus 5.' Albert's Blender kick (890): 'I've been on a Blender kick with Opus 5.5. Its better 3D modeling and vision mean you can build an entire world from a single prompt. Historically accurate San Francisco Market street in 1906, pre-earthquake' — with the full scope prompt (73) and the rollout note (31). Claude's own trio (261/257/226): the algorithmic drawing program, the toy brick-building app, and the launch prompt. Shipper's welcome mat (37): 'i added almost 10k new followers today!' with his Opus-5.5-vs-Sol-6 vibe check.

Rauchg's trio: the eval tally (1087 likes): 'We ran fresh Next.js evals. The tally: ① Opus 5.5 [97%] ② GPT 6 Sol [97%] ③ Fable 5.1 [97%] ④ Grok 4.7 [64%]. Notably, Grok is 2x-7x cheaper'; the taste note (1418): 'Love the tastefulness with which anthropic ships… With AI, there's no excuse not to push the design frontier. This is @nextjs at its finest'; and the immortality thesis (1045): 'Software will never die again. You liked Google Reader? Cool, you can generate and deploy your own. Yours, forever.' Thariq's trio: the shipping philosophy (4528): 'the right way to use model capabilities is not to ship 10x more features to prod. it's to spend more time understanding your users, trying experiments, building prototypes, learning about things you don't understand so that you can ship things that actually work'; the game-loop note (254); and the workflows note (73). Levie's Box numbers (232): 'At Box, we've been testing Opus 5.5 on complex enterprise knowledge work… 63% fewer tokens used, 42% less verbosity, and 30% faster vs. Opus 5.'

The fun: Amjad's bit (935 likes): 'Your intelligence is fake. It's artificial. Mine? It's super. Super Intelligence. Aka SI.' Steipete's archaeology (850): 'Had ChatGPT sometimes crashing on me after updating to macOS 27 and... Astra found a ~14 year old bug in libuv.' Garry Tan's trio: the Capy follow-up (111), the GStack note (155): 'If you're working on something cool, GStack does actually tell you to apply to YC :-)'; and the teaching mission (144): 'We need to teach the world to prompt and maximally use AI… to help all people see the way it can give you wings.'

The rest: Nikunj's SPV reveal (34): 'if you read headlines of a large fundraise, you can be reasonably sure now that a large amount of it came from SPVs even though the headlines say something else… don't believe the headlines anymore' — plus his A Walk In The Park episode (34) and YouTube note (0); Aditya's trio — the Waymo fireside (41): 'The first one my 9 year old asked to attend was yesterday's with Dmitri of Waymo'; the Sentience delight (23); and the safety-history note (17); Woodward's milestone (235); Peter Yang's Apple TV find (19); and his Opus-5.5 pointer (3).