Complementing reinforcement learning with SFT through logit averaging in the post training of LLMs
A new method for enhancing reinforcement learning in large language models (LLMs) has been proposed by researchers Xingwei Gan and Ying Zhu. This method involves averaging the logits of a frozen reference policy and a trainable policy, integrated into Group Relative Policy Optimization (GRPO). The approach shows improved or comparable accuracy on various benchmarks compared to traditional methods that use KL regularization.
- ▪The proposed method averages logits from a frozen reference policy and a trainable policy.
- ▪It is integrated into Group Relative Policy Optimization (GRPO) without using KL regularization or a critic.
- ▪The method was evaluated on MATH, cn-k12, and MMLU datasets, showing higher or comparable accuracy.
arXiv cs.AI files mainly under ai research. We currently carry 1,128 of its stories.
Story provenance
Source · retrieval · rights · ranking — open for full record
inspect →
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | arXiv cs.AI |
| Canonical URL | https://arxiv.org/abs/2605.20555 |
| Publication time | Fri, 22 May 2026 00:00:00 -0400 |
| Retrieval time | 2026-05-22T04:02:00.009Z |
| Last seen | 2026-05-22T04:02:00.009Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | -fMKnl0jxQYg |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Computer Science > Machine Learning arXiv:2605.20555 (cs) [Submitted on 19 May 2026] Title:Complementing reinforcement learning with SFT through logit averaging in the post training of LLMs Authors:Xingwei Gan, Ying Zhu View a PDF of the paper titled Complementing reinforcement learning with SFT through logit averaging in the post training of LLMs, by Xingwei Gan and 1 other authors View PDF HTML (experimental) Abstract:We introduce a novel method that averages the logits of a frozen reference policy (e.g., SFT) and a trainable policy, and incorporate the method into Group Relative Policy Optimization (GRPO).
…
Excerpt limited to ~120 words for fair-use compliance. The full article is at arXiv cs.AI.
Discussion
0 commentsMore from arXiv cs.AI
