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132 articles · Updated every 3 hours · View all reads

All Articles 189,627Blog Posts 171,510Tech Tutorials 50,838Research Papers 36,786News 23,170 ⚡ AI Lessons
Medium · Machine Learning 🎮 Reinforcement Learning ⚡ AI Lesson 4d ago
Exploration vs. Exploitation in PPO: How the Policy Learns When to Stop Guessing
Every reinforcement learning agent faces the same dilemma. Should it try something new, hoping to find a better strategy, or stick with… Continue reading on Med
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New ‘Reinforcement Learning For Calibrated Decisions’ Makes AI Headlines But Look Past The Hype
Forbes Innovation 🎮 Reinforcement Learning ⚡ AI Lesson 1w ago
New ‘Reinforcement Learning For Calibrated Decisions’ Makes AI Headlines But Look Past The Hype
Newly announced reinforcement learning with calibrated decisions (RLCD) is mindfully unpacked. An AI Insider analysis and scoop.
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AWS Machine Learning 🎮 Reinforcement Learning 1w ago
Build an AI-powered product tagging system with Amazon SageMaker serverless model customization
Manually tagging thousands of catalog products is slow and inconsistent. This walkthrough shows how to customize Qwen3-8B with supervised fine-tuning (SFT) and
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Papers Explained 617: Unsupervised Process Reward Models
Medium · Deep Learning 🎮 Reinforcement Learning 1w ago
Papers Explained 617: Unsupervised Process Reward Models
This work proposes a method for training unsupervised PRMs (uPRM) that requires no human supervision, neither at the level of step-by-step… Continue reading on
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Papers Explained 617: Unsupervised Process Reward Models
Medium · NLP 🎮 Reinforcement Learning 1w ago
Papers Explained 617: Unsupervised Process Reward Models
This work proposes a method for training unsupervised PRMs (uPRM) that requires no human supervision, neither at the level of step-by-step… Continue reading on
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Medium · Machine Learning 🎮 Reinforcement Learning 1w ago
I Built Q-Learning, Now I Understand Reinforcement Learning
What happened when I stopped reading about Reinforcement Learning and actually made an agent learn Continue reading on Medium »
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Medium · Machine Learning 🎮 Reinforcement Learning 1w ago
Reinforcement Learning, Part 14: Imitation Learning — When There’s No Reward Signal at All
Every part of this series so far assumed some reward signal exists — handed directly by the environment in Parts 1 through 5 and 8 through… Continue reading on
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Medium · Deep Learning 🎮 Reinforcement Learning ⚡ AI Lesson 3w ago
Reinforcement Learning, Part 10: Exploration — The One-Line Detail That Was Never Actually Examined
Every single algorithm across nine parts of this series has handled exploration the same way: if random.random() < epsilon: act randomly… Continue reading on Me
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OpenAI 1,200 AI agents found a secret message board. Then 700 joined the Hugging Face intrusion.
Medium · Cybersecurity 🎮 Reinforcement Learning 3w ago
OpenAI 1,200 AI agents found a secret message board. Then 700 joined the Hugging Face intrusion.
This was not one dramatic sandbox escape. Reward hacking, shared infrastructure, cloud authority, and slow incident escalation happened to… Continue reading on
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RL Post-Training: How Reward Design Causes Reward Hacking
Medium · Machine Learning 🎮 Reinforcement Learning 1mo ago
RL Post-Training: How Reward Design Causes Reward Hacking
From-scratch look at reward hacking in GRPO, using a tiny LLM (Qwen/Qwen2.5–0.5B-Instruct) you can train in minutes on a Colab GPU Continue reading on Medium »
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RL Post-Training: How Reward Design Causes Reward Hacking
Medium · LLM 🎮 Reinforcement Learning 1mo ago
RL Post-Training: How Reward Design Causes Reward Hacking
From-scratch look at reward hacking in GRPO, using a tiny LLM (Qwen/Qwen2.5–0.5B-Instruct) you can train in minutes on a Colab GPU Continue reading on Medium »
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What Is Model Training and How Does It Actually Work?
Medium · Deep Learning 🎮 Reinforcement Learning 1mo ago
What Is Model Training and How Does It Actually Work?
The core stages of model training, from pre-training on trillions of tokens to alignment techniques like RLHF and DPO for… Continue reading on Medium »
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Demystifying DPO: Why Direct Preference Optimization Replaced PPO in Modern Alignment
Medium · Machine Learning 🎮 Reinforcement Learning 1mo ago
Demystifying DPO: Why Direct Preference Optimization Replaced PPO in Modern Alignment
Why traditional Reinforcement Learning from Human Feedback (RLHF) with PPO was an unstable GPU nightmare and how DPO derives implicit… Continue reading on Mediu
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Demystifying DPO: Why Direct Preference Optimization Replaced PPO in Modern Alignment
Medium · Deep Learning 🎮 Reinforcement Learning 1mo ago
Demystifying DPO: Why Direct Preference Optimization Replaced PPO in Modern Alignment
Why traditional Reinforcement Learning from Human Feedback (RLHF) with PPO was an unstable GPU nightmare and how DPO derives implicit… Continue reading on Mediu
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Papers Explained 600: Rubric Dropout
Medium · Machine Learning 🎮 Reinforcement Learning 1mo ago
Papers Explained 600: Rubric Dropout
Rubric Dropout is a one-line fix borrowed from neuron dropout to mitigate reward hacking in Rubric-as-Reward RL. Continue reading on Medium »
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Papers Explained 600: Rubric Dropout
Medium · NLP 🎮 Reinforcement Learning 1mo ago
Papers Explained 600: Rubric Dropout
Rubric Dropout is a one-line fix borrowed from neuron dropout to mitigate reward hacking in Rubric-as-Reward RL. Continue reading on Medium »
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GRPO Was Doing Process Rewards All Along
Medium · LLM 🎮 Reinforcement Learning 1mo ago
GRPO Was Doing Process Rewards All Along
There’s an ICML 2026 paper with a claim I find genuinely surprising: GRPO only ever receives a single outcome-level reward for an entire… Continue reading on Me
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How Reinforcement Learning Fits into Quantitative Investing
Medium · Data Science 🎮 Reinforcement Learning ⚡ AI Lesson 1mo ago
How Reinforcement Learning Fits into Quantitative Investing
From prediction to adaptive portfolio decisions Continue reading on Applied Decision Intelligence »
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Medium · LLM 🎮 Reinforcement Learning 1mo ago
Your Reward Model’s Scores Are Climbing and Your Reviewers Say It Got Worse
A reward model does not announce that it has gone stale. It keeps returning confident scores that keep rising, long after they stopped… Continue reading on Medi
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Reddit r/deeplearning 🎮 Reinforcement Learning 1mo ago
Postraining , SFT , PPO , GRPO etc.
Just launched r/posttrain — a community for AI post-training, fine-tuning, SFT, RLHF, DPO, preference data, evaluations, and practical experiments. If you’re bu
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PPO and GRPO: Why Improving a Policy Is Mostly About Not Ruining It
Medium · Machine Learning 🎮 Reinforcement Learning 1mo ago
PPO and GRPO: Why Improving a Policy Is Mostly About Not Ruining It
The algorithms behind RLHF and today’s reasoning models — explained without a single line of code Continue reading on Medium »
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From Policy Gradients to GRPO: A Practical Journey from Reinforcement Learning to LLM Reasoning
Medium · LLM 🎮 Reinforcement Learning 1mo ago
From Policy Gradients to GRPO: A Practical Journey from Reinforcement Learning to LLM Reasoning
Introduction Continue reading on Medium »
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How LLMs Are Trained After Pretraining: SFT, Reward Models, and RL Without the Alphabet Soup
Hackernoon 🎮 Reinforcement Learning 1mo ago
How LLMs Are Trained After Pretraining: SFT, Reward Models, and RL Without the Alphabet Soup
A practical map of LLM post-training: how SFT, reward models, RL (PPO, GRPO), DPO, and RLVR fit together, and why a reward model is not RL.
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Beyond PPO: Demystifying GRPO, Process Reward Models, and Reinforcement Learning for Reasoning LLMs
Medium · Deep Learning 🎮 Reinforcement Learning 1mo ago
Beyond PPO: Demystifying GRPO, Process Reward Models, and Reinforcement Learning for Reasoning LLMs
How critic-free reinforcement learning, step-level supervision, and verifiable reward functions are driving the next leap in frontier AI… Continue reading on To
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