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[@swyx](/creator/twitter/swyx)
"Cursor CPO @sualehasif996 Turbopuffer CEO @Sirupsen Notion AI Engineer @akm_io Braintrust CEO @ankrgyl Great discussion on all things Semantic Search and honestly the hard parts of AI Engineering some spicy things said - in my entire career nobody uses knowledge graphs - turbopuffer will run every sql query - some cool details on how Cursor uses turbopuffer"  
[X Link](https://x.com/swyx/status/1973947381935976470) [@swyx](/creator/x/swyx) 2025-10-03T03:05Z 129K followers, 127.5K engagements


"TIL that USB-C still has orientation and you dont know which side is correct unless you test"  
[X Link](https://x.com/swyx/status/1976325840649814475) [@swyx](/creator/x/swyx) 2025-10-09T16:36Z 129K followers, 244K engagements


"Chairwoman/CEO of Banco Santander is koding"  
[X Link](https://x.com/swyx/status/1977823028215169421) [@swyx](/creator/x/swyx) 2025-10-13T19:45Z 129K followers, 16.8K engagements


"now seems a particularly good time to remind you why I asked @eugeneyan to curate an entire track of LLMs in Recsys talks at @aidotengineer Youtubes Large Recommender Model is literally LLM continuously pretrained every few hours with new tokens for each video served to 2B daily active users im not BSing you this is the biggest thing in recsys since (pagerank)"  
[X Link](https://x.com/swyx/status/1979291014990074030) [@swyx](/creator/x/swyx) 2025-10-17T20:58Z 129K followers, 27.6K engagements


"Claude Code: no evals well known code agent company: no evals well known code agent company 2: kinda halfassed evals leading vibe coding company: no evals ceo of company selling you evals: mmmmm yess all my top customers do evals you should do evals vc's in love with ceo of evals company: mmmmm yes all my top founders do evals must do evals (NOTE: i -do- also think that evals are impt but the eval pilled ai engineers have also noticed that it is not a strict requirement for success and at least for 0-to-1 stage may even be anticorrelated think thru why)"  
[X Link](https://x.com/swyx/status/1963725773355057249) [@swyx](/creator/x/swyx) 2025-09-04T22:08Z 128.9K followers, 579.9K engagements


"as in the phrase will stick around but has flipped from an enjoyable feeling of being in flow to a slur synonymous with slop. it wasn't meant to be so i'm sad for the collateral damage but the ai engineers are no longer tolerating bad vibe coding this was vibe coded"  
[X Link](https://x.com/swyx/status/1975811699392553334) [@swyx](/creator/x/swyx) 2025-10-08T06:33Z 128.9K followers, 217.6K engagements


"we'll be announcing the full AIE CODE slate soon but excited to share that Applied Compute will be doing their first ever public talk next month one dream I had for @aidotengineer was to create the definitive launchpad/concise curation for the best AI startups products and ideas of each theme/year. RL + Code is one of the biggest themes of the year (obviously) and I'm excited to showcase all the leaders in the field. Join us Nov 20-22 in NYC"  
[X Link](https://x.com/swyx/status/1978165375197122879) [@swyx](/creator/x/swyx) 2025-10-14T18:25Z 128.9K followers, 14.9K engagements


"@tricalt @cs50 well actually"  
[X Link](https://x.com/swyx/status/1978887740310671370) [@swyx](/creator/x/swyx) 2025-10-16T18:16Z 128.9K followers, 1588 engagements


"@alejandrofanjul @windsurf diff model but yeah thanks"  
[X Link](https://x.com/swyx/status/1978936187499778296) [@swyx](/creator/x/swyx) 2025-10-16T21:28Z 128.9K followers, XX engagements


"OAIs new ChatKit just rekt like XXX agent builder startups"  
[X Link](https://x.com/swyx/status/1975255380734419201) [@swyx](/creator/x/swyx) 2025-10-06T17:42Z 128.9K followers, 267.4K engagements


"ok the algo is going to nuke this to shit but a kind @latentspacepod discord member gathered all the official devday links for us. rt to rebal the algo pls Website: Introducing apps in ChatGPT and the new Apps SDK (blog): Apps SDK (docs): Introducing AgentKit (blog): Agents (docs): ChatKit Studio (app): (playground widget builder demo) Guardrails (docs): Evals (docs): Codex is now generally available (blog): Codex SDK (docs): Service Health dashboard: (n/a for me) GitHub projects: (apps chatkit guardrails) Models gpt-5 pro (model): gpt-realtime-mini-2025-10-06 (model): (70% cheaper)"  
[X Link](https://x.com/swyx/status/1975339546217947230) [@swyx](/creator/x/swyx) 2025-10-06T23:17Z 128.9K followers, 44.2K engagements


"btw Cognition taking over the Windsurf codebase and the roadmap of a 100m ARR enterprise biz is causing one of the biggest bootstrapping agent loop i've seen since now the company has async and sync agents to work on each other while still staying a tiny team Codemaps is the first new big product feature to be added to @windsurf post acquisition to solve the large codebase understanding problem. not GA'ed yet but you can try in Next if you know where to look"  
[X Link](https://x.com/swyx/status/1977532545089798488) [@swyx](/creator/x/swyx) 2025-10-13T00:31Z 128.9K followers, 102K engagements


"it turns out if you take code context engineering very very very seriously. it's useful for humans too"  
[X Link](https://x.com/swyx/status/1977907055802339804) [@swyx](/creator/x/swyx) 2025-10-14T01:19Z 128.9K followers, 4558 engagements


"Excited to catch up with @jamesallworth onstage at @Cloudflare Connect in XX mins come day hi if youre at the Aria Las Vegas today. also imma need @kapehe_ok to hook me up with a triangle hoodie to complete all the CDN cloud infrastructure infinity stones"  
[X Link](https://x.com/swyx/status/1978513138078335392) [@swyx](/creator/x/swyx) 2025-10-15T17:27Z 128.9K followers, 5828 engagements


"Lastly why bother working on Fast Agents at all when others are celebrating XX hours of autonomy w/ no accountability. less cynically if i am going to "fire and forget" agents what does it matter if it takes X mins vs XX more in the post but basically the Coding Agent landscape is bifurcating very hard in the sync and async experiences which are both worth exploring but have different dimensions to pursue. the only mistake is to stay mid. inspired by @gail_goodman i have nicknamed this "The Semi Async Valley of Death". @Devinai pioneered async background parallelized agents but take a close"  
[X Link](https://x.com/swyx/status/1978903254345093319) [@swyx](/creator/x/swyx) 2025-10-16T19:17Z 128.9K followers, 11.8K engagements


"@siddsax @cs50 mm i think we wouldn't be that useful in non-coding we are tuning exclusively for koding BUT X. cli coming X. context export coming next"  
[X Link](https://x.com/swyx/status/1978945135657521582) [@swyx](/creator/x/swyx) 2025-10-16T22:04Z 128.9K followers, XXX engagements


"@micnubinub @windsurf got a screenshot/loom"  
[X Link](https://x.com/swyx/status/1979218868427198492) [@swyx](/creator/x/swyx) 2025-10-17T16:12Z 128.9K followers, XX engagements


"@slavamorozov23 @windsurf fixed"  
[X Link](https://x.com/swyx/status/1979218919115432398) [@swyx](/creator/x/swyx) 2025-10-17T16:12Z 128.9K followers, XX engagements


"@okey1970 @windsurf 🔜"  
[X Link](https://x.com/swyx/status/1979218977214861614) [@swyx](/creator/x/swyx) 2025-10-17T16:12Z 128.9K followers, XX engagements


"@Ahoo_Ahuu @windsurf and yesterday was the first of a few planned launches :)"  
[X Link](https://x.com/swyx/status/1979220481841721519) [@swyx](/creator/x/swyx) 2025-10-17T16:18Z 128.9K followers, XX engagements


"@steipete so @kbal11 runs the @latentspacepod AI in Action discord club (every friday 1pm) and we love this kind of convo wondering if you'd be up for joining to talk long form thru this"  
[X Link](https://x.com/swyx/status/1979237092740993101) [@swyx](/creator/x/swyx) 2025-10-17T17:24Z 128.9K followers, XXX engagements


"there are basically X working weeks left in the US launch calendar* @aidotengineer code: nov 20-22 thanksgiving: nov 27-30 neurips: dec 2-7 idk if it was intentional but @GoogleDeepMind made a smart move delaying Gemini X to basically EOY. almsot everyone else has shown their Q4 cards except Xai and GDM *Deepseek ofc is famous Christmas disrepecter"  
[X Link](https://x.com/swyx/status/1979263331941990795) [@swyx](/creator/x/swyx) 2025-10-17T19:08Z 128.9K followers, 1119 engagements


"@anujxforge cheap model request = uses context window less youre saying windsurf prompts/tools are bad"  
[X Link](https://x.com/swyx/status/1979372833940869303) [@swyx](/creator/x/swyx) 2025-10-18T02:23Z 128.9K followers, XXX engagements


"crazy that people were running around saying shit like this and went viral for it from 2023-2025 very glad for karpathy to get everyone to calm down and just fucking build"  
[X Link](https://x.com/swyx/status/1980068157642690976) [@swyx](/creator/x/swyx) 2025-10-20T00:26Z 128.9K followers, 6400 engagements


"@eisokant @taylor_w_c @CoreWeave congrats full stack indeed"  
[X Link](https://x.com/swyx/status/1978490069477691671) [@swyx](/creator/x/swyx) 2025-10-15T15:56Z 129K followers, 2769 engagements


"@shyamalanadkat wdym we just got started"  
[X Link](https://x.com/swyx/status/1979969550843252934) [@swyx](/creator/x/swyx) 2025-10-19T17:55Z 128.9K followers, XXX engagements


"lowkey the best thing about @xai is the Voice Mode. I got SuperGrok just to test out Grok X and do KaraokeBench on Grok 4s Eve Voice (the one that does opera) but actually Im going to keep SuperGrok around because its actually just a much much better voice mode than @chatgptapp like: - open straight to voice mode - SPEED CONTROLS - MUTE BUTTON - PROMPTABLE VOICES - auto suggestions - interruptions that dont suck - unhinged mode this thing is made by people who actually use the product"  
[X Link](https://x.com/swyx/status/1943850152059711903) [@swyx](/creator/x/swyx) 2025-07-12T01:49Z 129K followers, 11.5M engagements


"ok life update: i'll be joining @Cognition Cog just went from X to $10b in X years Net burn $20m in company history Avg successful Devin impl sees 5x growth $1.5m/yr customer expanded 10x in X months (not typo) Windsurf x Cog cross sell going great looking fwd to cross build. Lighthouse customers in every vertical. Windsurf's polish + Wave 13/14 are looking v HYPE more work to do on Windsurf Tab Here's the X decision points I had to cross to "buy" Cognition's rise as an Agent Lab that has the potential to be as dominant in the Decade of Agents: Short Code timelines Long AGI timelines The rise"  
[X Link](https://x.com/swyx/status/1965183110016098617) [@swyx](/creator/x/swyx) 2025-09-08T22:38Z 129K followers, 581.7K engagements


"people are insufficiently calibrated on Sonnet XXX imo there were a lot of memes about the "great lock in of sept-dec" but yesterday was really the starting gun to give you some perspective last koding model jump of this magnitude spawned Devin XXX Windsurf Lovable Bolt et al. it's all hands on deck at Cog team is extremely energized"  
[X Link](https://x.com/swyx/status/1973112150760783922) [@swyx](/creator/x/swyx) 2025-09-30T19:46Z 128.9K followers, 139.5K engagements


"after about a year of searching i finally understand why LTM-1 was the wrong approach tldr i think the @cognition team have just figured out how to kill long context -and- traditional coderag at test time with a new model. results will be increasingly obvious as you scale up to 100m toks. team is at work today writing up the results will present next week. it's not rocket science but it will be retroactively obvious. which i've always said is the best kind of obvious"  
[X Link](https://x.com/swyx/status/1974589291335749940) [@swyx](/creator/x/swyx) 2025-10-04T21:35Z 129K followers, 178.4K engagements


"anthropic 2024 vs anthropic 2025 vibe rebrand must be dissected in harvard business school studies for the next decade"  
[X Link](https://x.com/swyx/status/1974723847455981868) [@swyx](/creator/x/swyx) 2025-10-05T06:30Z 129K followers, 405K engagements


"RIP Vibe Coding Feb 2025 - Oct 2025"  
[X Link](https://x.com/swyx/status/1975711519506833424) [@swyx](/creator/x/swyx) 2025-10-07T23:55Z 129K followers, 1.1M engagements


"@staysaasy no its just very in the air right now that people are looking for the antithesis to vibe coding"  
[X Link](https://x.com/swyx/status/1975722615139672258) [@swyx](/creator/x/swyx) 2025-10-08T00:39Z 129K followers, 154.1K engagements


"i need to get better at email. I've been a @superhuman user for X years. things that frustrate me about superhuman: - no preview pane. gmail has this. unacceptable. - setting up filters / split inbox is still way too primitive - important vs other filter regularly misclassifies important email. i have no confidence that "move to important" updates any ML anywhere. - when i search for a key term i sigh when it is found in a long thread of XX emails bc superhuman doesnt dig into that for you. - ai feature just isnt that good. 80-90% of my ai usage is me trying to search. and when i try to use"  
[X Link](https://x.com/swyx/status/1976076936381407575) [@swyx](/creator/x/swyx) 2025-10-09T00:07Z 129K followers, 45.6K engagements


"Anthropic has had a Head of Developer Relations role open for the last X months despite offering $385-460k salary This is my attempt to explain why after kind of dying out last year DevRel is So Back thanks to prompting from @philvanonline and @pdrmnvd . something's changed. as always if you know capable people looking for a devrel role I can refer you to a large range of fantastic AI startups from OpenAI to Fireworks to others I invested in"  
[X Link](https://x.com/swyx/status/1977617630136828288) [@swyx](/creator/x/swyx) 2025-10-13T06:09Z 129K followers, 215.2K engagements


"relatively consensus now that traditional embeddings RAG is dead. @jerryjliu0 called it first at the 2024 AIE WF - Agentic RAG was clearly better in almost every way except speed. will be sharing more about the journey to Agentic Search and whats next at @elastics sf closing keynote next week thanks so much to @xeraa for the invite register here"  
[X Link](https://x.com/swyx/status/1977845594518601733) [@swyx](/creator/x/swyx) 2025-10-13T21:15Z 129K followers, 23.4K engagements


"btw if you liked DeepWiki you're gonna love what's coming next for repos like this. trying to see what we can open source too"  
[X Link](https://x.com/swyx/status/1977906767771086898) [@swyx](/creator/x/swyx) 2025-10-14T01:18Z 129K followers, 64.4K engagements


""more than twice the speed" is underselling Haiku tbh built a way to directly compare Sonnet v Haiku XXX and it's roughly 3.5x faster but the UX feels SO much better because Haiku stays inside the "flow window". obviously end to end latency varies a lot so Ant can't report a real number without production usage but you should try heads up comparisons"  
[X Link](https://x.com/swyx/status/1978524858834456620) [@swyx](/creator/x/swyx) 2025-10-15T18:14Z 129K followers, 161.6K engagements


"more side by side comparisons of @AnthropicAI Claude Haiku XXX vs Sonnet XXX in @windsurf here's Haiku vs Sonnet on @flavioAd's hexagon test the thing about fast models is that you can iterate with human guidance 2x in the time that it takes the slower model to do X round. that human input matters"  
[X Link](https://x.com/swyx/status/1978578087752372452) [@swyx](/creator/x/swyx) 2025-10-15T21:45Z 129K followers, 4670 engagements


"ok so let me explain why subagents kill long context Like you can spend $500m building XXX million context models and they would be 1) slow 2) expensive to use 3) have huge context rot. O(n) is the lower bound. Cog's approach is something you learn in day X of @CS50 - divide and parallelize. Embeddings are too dumb Agentic Search is too slow. So train limited-agency (max X turns) natively parallel tool calling (avg parallelism of 7-8 custom toolset) fast (2800tok/s) subagents to give the performance of Agentic Search under an acceptable "Flow Window" that feels immaterially slower than"  
[X Link](https://x.com/swyx/status/1978874342743343254) [@swyx](/creator/x/swyx) 2025-10-16T17:23Z 129K followers, 224.3K engagements


"there are basically X working weeks left in the US launch calendar* @aidotengineer code: nov 20-22 thanksgiving: nov 27-30 neurips: dec 2-7 idk if it was intentional but @GoogleDeepMind made a smart move delaying Gemini X. almsot everyone else has shown their Q4 cards except Xai and GDM *Deepseek ofc is famous Christmas disrepecter"  
[X Link](https://x.com/swyx/status/1979264645052665953) [@swyx](/creator/x/swyx) 2025-10-17T19:13Z 129K followers, 16.3K engagements


"@OfficialLoganK @GoogleAIStudio single most important thing that held back Vertex 👏"  
[X Link](https://x.com/swyx/status/1979961926148129060) [@swyx](/creator/x/swyx) 2025-10-19T17:24Z 129K followers, 1279 engagements


"btw one of my podcast goals is to capture unrecorded high alpha talks that would otherwise be lost to history Elie condensed his State of Pre-training talk to 1hr and updated it for all the latest conversations incl Muon DeepSeek NSA and even @arimorcos' BeyondWeb. Enjoy (and pls suggest other talks)"  
[X Link](https://x.com/swyx/status/1980286306312999071) [@swyx](/creator/x/swyx) 2025-10-20T14:53Z 129K followers, 32.1K engagements