Ori Goshen is the Co-founder and CEO of AI21 Labs, the Israeli AI company founded in 2017. AI21 has built its own foundation models and AI products used by millions, including Wordtune, and today it offers enterprises Lab-as-a-Service: their own frontier AI lab.~~~~~~~~~~~~~This episode is brought to you by Nebius — the ultimate cloud for AI innovators.Nebius provides AI infrastructure you can count on, combining reliability and speed with flexibility and engineering support unmatched by hyperscalers.AI leaders like Meta, Shopify, and Higgsfield already partner with Nebius to run their AI workloads. Plus, venture-backed startups can save up to $150,000 on compute costs when they apply for access. Visit nebius.com or nebius.com/startups to learn more~~~~~~~~~~~~~AI21's forward-deployed researchers, most of them PhDs and MSc holders, work embedded with a customer's team to train a specialized model and its agent harness together on the company's proprietary data. It's all built on AI21's platform for evaluating, training and serving models: eval suites, data generation pipelines, post-training infrastructure for supervised fine-tuning and reinforcement learning against task-specific rewards, harness optimization, and optimized inference. Customers own the resulting weights and harness, along with a documented, reproducible training recipe, and projects take weeks rather than quarters. Before AI21, Ori co-founded Crowdx, a network analytics company acquired by Cellwize, which Qualcomm later acquired.Topics

• Why enterprises want their own AI lab, and what that takes
• Post-training small, specialized models that outperform general frontier models on real tasks
• Optimizing the harness around a model, not just the model itself
• Why the next wave of AI gains will come from AI improving the systems that run AI

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