AI NewsOpenAI Rolls Out GPT-5.5 For Agentic Coding and Autonomous Workflows
10:11 AM IST · April 24, 2026
OpenAI said GPT-5.5 is its “smartest and most intuitive” system yet, capable of understanding intent faster and completing tasks in one go.
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OpenAI said GPT-5.5 is its “smartest and most intuitive” system yet, capable of understanding intent faster and completing tasks in one go.
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Sierra, the customer service agent startup founded byBret Taylor, announced on Thursday that it has acquired theYC-backed French startup Fragment, which helps businesses integrate AI into workflows. This is Sierra’s third public acquisition. It previously bought Japan-based enterprise AI solutions company Opera Tech (which it acquired in late March) and voice agent company Receptive AI (which it also announced it acquired in late March). Fragment co-founders Olivier Moindrot and Guillaume Genthial will be joining the Sierra team. In a blog post, Taylor and his co-founder, Clay Bavor, wrote that Moindrot and Genthial will bring “valuable strength” to Sierra’s “agent development efforts in France.” Terms of the deal were not announced. PitchBook estimates that Fragment raised around $2 million through its seed round. Taylor, who also serves as OpenAI’s chairman of the board, co-founded Sierra alongside Google alum Bavor after stepping down as co-CEO of Salesforce in early 2023. The startup claims Casper, Clear, and Brex as customers and has raised more than$630 million in funding to date, from investors including Sequoia and Benchmark, giving it a $10 billion valuation.
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Surviving the early days as an AI startup isn’t just about making the technology work — it’s about hiring the right people, avoiding costly mistakes, and standing out in a crowded market. This week on Build Mode, Isabelle Johannessen sits down with Jaspar Carmichael-Jack, founder and CEO of Artisan, a fast-growing AI startup building AI employees for sales. Best known for its viral “Stop Hiring Humans” campaign, Artisan is rethinking outbound sales with AI, while still betting on hiring exceptional human talent. In this episode, they break down what it really takes to build and scale a venture-backed AI company, from Y Combinator to rapid growth. This conversation covers: Subscribe to Build Mode onApple Podcasts,Spotify, orwherever you like to listen. And watch the full videos onYouTube. Apply to Startup Battlefield:We are looking for early-stage companies that have an MVP. So nominate a founder (or yourself). Be sure to say you heard about Startup Battlefield from the Build Mode podcast.Apply here. TechCrunch Disrupt 2026:We’re back for TechCrunch Disrupt on October 13 to 15 in San Francisco, where the Startup Battlefield 200 takes the stage. So if you want to cheer them on, or just network with thousands of founders, VCs, and tech enthusiasts, thengrab your tickets. Use codebuildmode15 for 15% off any ticket type. New episodes ofBuild Modedrop every Thursday. Hosted by Isabelle Johannessen. Produced and edited by Maggie Nye. Audience development led by Morgan Little. Special thanks to the Foundry and Cheddar video teams.
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Loading the player… Surviving the early days as an AI startup isn’t just about making the technology work — it’s about hiring the right people, avoiding costly mistakes, and standing out in a crowded market. This week on Build Mode, Isabelle Johannessen sits down with Jaspar Carmichael-Jack, founder and CEO of Artisan, a fast-growing AI startup building AI employees for sales. Best known for its viral “Stop Hiring Humans” campaign, Artisan is rethinking outbound sales with AI, while still betting on hiring exceptional human talent. In this episode, they break down what it really takes to build and scale a venture-backed AI company, from Y Combinator to rapid growth. This conversation covers: This conversation gets to the heart of building a startup: making the right hires early or paying for it later. Subscribe to Build Mode onApple Podcasts,Spotify, orwherever you like to listen. And watch the full videos onYouTube. Apply to Startup Battlefield:We are looking for early-stage companies that have an MVP. So nominate a founder (or yourself). Be sure to say you heard about Startup Battlefield from the Build Mode podcast.Apply here. TechCrunch Disrupt 2026:We’re back for TechCrunch Disrupt on October 13 to 15 in San Francisco, where the Startup Battlefield 200 takes the stage. So if you want to cheer them on, or just network with thousands of founders, VCs, and tech enthusiasts, thengrab your tickets. Use codebuildmode15 for 15% off any ticket type.
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