How to Build, Train, and Compare Multiple Reinforcement Learning Agents in a Custom Trading Environment Using Stable-Baselines3

In this tutorial, we explore advanced applications of Stable-Baselines3 in reinforcement learning. We design a fully functional, custom trading environment, integrate multiple algorithms such as PPO and A2C, and develop our own training callbacks for performance tracking. As we progress, we train, evaluate, and visualize agent performance to compare algorithmic efficiency, learning curves, and decision…

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A New AI Research from Anthropic and Thinking Machines Lab Stress Tests Model Specs and Reveal Character Differences among Language Models

AI companies use model specifications to define target behaviors during training and evaluation. Do current specs state the intended behaviors with enough precision, and do frontier models exhibit distinct behavioral profiles under the same spec? A team of researchers from Anthropic, Thinking Machines Lab and Constellation present a systematic method that stress tests model specs…

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Who are AI browsers for?

OpenAI launched an AI-powered web browser called ChatGPT Atlas this week, which makes me wonder: Is it finally time to ditch Safari? That news was on our minds as Max Zeff, Sean O’Kane, and I discussed the browser landscape — including some lesser-known alternatives — on the latest episode of the Equity podcast. But it…

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TikTok robot star Rizzbot gave me the middle finger

A couple of Thursdays ago, I awoke at nearly 4:30 a.m. to a dizzying Instagram DM.   Rizzbot, a popular humanoid robot with more than 1 million TikTok followers and more than half a million followers on Instagram, had sent me a photo: he was flipping me off.  No words. No explanation. Just a robot with its middle finger raised.   Although I was shocked, a sinking feeling meant…

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