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Peter Tanski

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AI & ML interests

Machine Learning, Artificial Intelligence

Recent Activity

upvoted a paper 15 days ago
Top-nσ: Not All Logits Are You Need
upvoted an article about 1 month ago
What’s MXFP4? The 4-Bit Secret Powering OpenAI’s GPT‑OSS Models on Modest Hardware
reacted to Kseniase's post with 👍 about 2 months ago
10 Latest Preference Optimization Techniques Models need feedback on what makes outputs “good” or “bad.” Policy optimization (PO) turns preferences and rewards into actual training signals. This field is evolving quickly, moving far beyond classics like PPO and GRPO. So here is our overview of 10 newest PO methods: 1. Pref-GRPO → https://huggingface.co/papers/2508.20751 Stabilizes text-to-image reinforcement learning (RL) with pairwise preference rewards and a unified UNIGENBENCH benchmark 2. PVPO (Policy with Value Preference Optimization) → https://huggingface.co/papers/2508.21104 This critic-free RL method uses a pre-trained model as a reference anchor to reduce bias and guide learning, selecting high-value examples through data pre-sampling 3. DCPO (Dynamic Clipping Policy Optimization) → https://huggingface.co/papers/2509.02333 Uses dynamic clipping, which adjusts probability limits per token for better token exploration, and smooth reward standardization to balance rewards over training steps and prevent wasted updates 4. ARPO (Agentic Reinforced Policy Optimization) → https://huggingface.co/papers/2507.19849 Optimizes multi-turn LLM agents that use external tools. It uses an entropy-based adaptive rollout to explore post-tool use and an advantage attribution method to better assign credit across steps, leading to more efficient tool use with fewer resources 5. GRPO-RoC (Group Relative Policy Optimization with Resampling-on-Correct) → https://huggingface.co/papers/2508.20722 Oversamples rollouts, then resamples them to keep diverse mistakes and only the highest-quality correct answers. It reduces noises and ends up with stronger reasoning in a code environment Read further below ⬇️ If you like this, also subscribe to the Turing post: https://www.turingpost.com/subscribe
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