[{"data":1,"prerenderedAt":238},["ShallowReactive",2],{"project-45027597":3},{"id":4,"name":5,"line":6,"line_source":7,"title":8,"url":9,"domain":10,"maker":11,"posted_at":12,"year":13,"points":14,"comments":15,"rank_in_year":16,"shown_in_year":17,"top":18,"tier":19,"category":20,"subcategory":21,"format":22,"keywords":23,"reception":28,"sentiment":29,"stance_mix":30,"scored_comments":35,"aspects":36,"strip":42,"post_text":44,"what":45,"said":77,"maker_in_thread":155,"shape":157,"grid":161,"attempts":200,"same_week":201,"maker_shows":34,"maker_hidden":230,"reader_version":231,"card":232},"45027597","Smooth","Faster, cheaper browser agent API","title","Show HN: Smooth – Faster, cheaper browser agent API","https:\u002F\u002Fwww.smooth.sh\u002F","smooth.sh","liukidar",1756220702,2025,54,16,1200,3837,32,"notable","ai","browser agent api","api",[24,25,26,27],"browser agent","web automation","browser api","captcha solver","curious",0.167,{"positive":31,"neutral":32,"mixed":33,"critical":34},3,10,0,2,15,{"performance":37,"execution":39,"idea":40,"privacy":41},{"positive":38,"critical":33},1,{"positive":38,"critical":33},{"positive":33,"critical":38},{"positive":33,"critical":38},[43,31,31,31,31,31,38,33,31,43,31,31,31,38,43,31],5,"Hey there HN! We're Antonio and Luca, and we're excited to introduce Smooth, a state-of-the-art browser agent that is 5x faster and 7x cheaper than Browser Use (https:\u002F\u002Fdocs.circlemind.co\u002Fperformance).\n\nWe built Smooth because existing browser agents were slow, expensive, and unreliable. Even simple tasks could take minutes and cost dollars in API credits.\n\nWe started as users of Browser Use, but the pain was obvious. So we built something better. Smooth is 5x faster, 7x cheaper, and more reliable. And along the way, we discovered two principles that make agents actually work.\n\n(1) Think like ",{"problem":46,"audience":52,"pricing":56,"motivation":60,"time_to_build":64,"stack":65,"openness":74,"stage":75,"team_size":76},{"value":47,"source":48,"evidence":49},"Existing browser agents are slow, expensive and unreliable","maker",[50],{"id":51},"post",{"value":53,"source":48,"evidence":54},"Developers building apps that need browser automation",[55],{"id":51},{"value":57,"source":48,"evidence":58},"Free trial available",[59],{"id":51},{"value":61,"source":48,"evidence":62},"Existing browser agents were slow, expensive and unreliable",[63],{"id":51},null,[66],{"value":67,"source":68,"evidence":69},"Small efficient LLMs","commenter",[70],{"id":71,"by":72,"text":73},"45028214","antves","Thanks! It all boils down to (1) using small and efficient models, and (2) insisting on good context engineering. We describe the browser state in a way that's both compact and…","unknown","launched","team",{"praise":78,"objections":93,"requests":111,"questions":126,"alternatives":142},[79,86],{"value":80,"source":68,"evidence":81},"Fast demo performance",[82],{"id":83,"by":84,"text":85},"45028035","ayushr1","Super impressive demo. Seems a lot faster than alternatives. How did you achieve that?",{"value":87,"source":68,"evidence":88},"Complex prompt handled well",[89],{"id":90,"by":91,"text":92},"45028350","ukulerok","I just wrote a complex prompt and it did a good job. How do you do evals or testing of your project?",[94,105],{"value":95,"source":68,"evidence":96},"Browser agents vulnerable to prompt injection; mitigations insufficient",[97,101],{"id":98,"by":99,"text":100},"45035452","creatonez","> 2. We have a critic LLM that assesses among other things whether the website content is leading a non-aligned initiative. This is still subject to the LLM intelligence, but…",{"id":102,"by":103,"text":104},"45032952","jasonriddle","Hi, thanks for sharing. My main concern with these browser agents are how are they handling prompt injection. This blog post on Perplexity's Comet browser comes to mind:…",{"value":106,"source":68,"evidence":107},"Seems like spambot tooling given proxy rotation and CAPTCHA solving",[108],{"id":109,"by":99,"text":110},"45033854","So you're shamelessly selling spambots? The marketing here is wild... \"proxy rotation\"... \"auto-CAPTCHA solvers\"",[112,119],{"value":113,"source":68,"evidence":114},"Support for deterministic extractor scripts",[115],{"id":116,"by":117,"text":118},"45032874","TheTaytay","Do you support writing deterministic extractor scripts? I want to use an agent like this primarily as a way to help me write and refine deterministic extraction scripts, rather…",{"value":120,"source":68,"evidence":121},"Sign up without Google SSO",[122],{"id":123,"by":124,"text":125},"45037758","PhilippGille","Is there a way to sign up without Google SSO?",[127,131,138],{"value":128,"source":68,"evidence":129},"How is prompt injection handled",[130],{"id":102,"by":103,"text":104},{"value":132,"source":68,"evidence":133},"How LLM-Ex is structured",[134],{"id":135,"by":136,"text":137},"45047297","ekusiadadus","Really interesting work! I have two questions: 1.LLM-Ex > We call this LLM-Ex. Could you share more about the internal structure of LLM-Ex? Is it something like a fixed XML-style…",{"value":139,"source":68,"evidence":140},"How evals and testing are done",[141],{"id":90,"by":91,"text":92},[143,147,151],{"value":144,"source":48,"evidence":145},"Browser Use",[146],{"id":51},{"value":148,"source":68,"evidence":149},"Perplexity Comet",[150],{"id":102,"by":103,"text":104},{"value":152,"source":68,"evidence":153},"Claude for Chrome",[154],{"id":102,"by":103,"text":104},{"comments":33,"answered":33,"key":156},[],{"commenters":158,"max_depth":159,"maker_replies":33,"first_comment_mins":18,"lifespan_hours":160},9,4,34,[162,164,166,168,171,173,176,178,181,182,184,186,188,190,193,198],[83,33,43,163,84,33],"project\u002Fpositive\u002Fperformance",[71,33,31,165,72,33],"maker\u002Fneutral\u002Fexecution",[116,38,31,167,117,33],"project\u002Fneutral\u002Fidea",[169,38,31,170,72,33],"45032971","maker\u002Fneutral\u002Fnone",[102,34,31,172,103,33],"project\u002Fneutral\u002Fprivacy",[174,34,31,175,72,33],"45033130","maker\u002Fneutral\u002Fprivacy",[98,34,38,177,99,33],"project\u002Fcritical\u002Fprivacy",[179,34,33,180,72,33],"45036904","commenter\u002Fneutral\u002Fprivacy",[135,31,31,167,136,33],[90,159,43,183,91,33],"project\u002Fpositive\u002Fexecution",[185,159,31,165,72,33],"45028580",[123,43,31,187,124,33],"project\u002Fneutral\u002Fexecution",[189,43,31,170,72,33],"45038985",[109,191,38,192,99,33],6,"project\u002Fcritical\u002Fidea",[194,195,43,196,197,33],"45035559",7,"project\u002Fpositive\u002Fnone","JoshPurtell",[199,195,31,170,72,33],"45036857",[],[202,207,212,217,221,226],{"id":203,"name":204,"points":205,"category":206},"45014131","Base",693,"dev_tools",{"id":208,"name":209,"points":210,"category":211},"45028002","BYTE magazine archive",423,"learning_science",{"id":213,"name":214,"points":215,"category":216},"45003420","Clearcam",233,"security_privacy",{"id":218,"name":219,"points":220,"category":206},"44988271","xsl-website",211,{"id":222,"name":223,"points":224,"category":225},"45039292","Animal Crossing Letter Generator",203,"creative",{"id":227,"name":228,"points":229,"category":206},"45024532","markdown-ui",202,false,"v2",{"id":233,"name":5,"line":6,"ai":230,"cat":20,"year":13,"points":14,"comments":15,"rec":28,"s":234,"top":18,"kw":235,"maker":11,"domain":10,"tier":19,"attempts":33,"strip":236,"url":9,"mix":237,"praise":80,"objection":95,"sub":21},45027597,0.17,[24,25,26,27],"5333331035333153",[31,32,33,34],1794036681341]