Searching for High-Value Molecules Using Reinforcement Learning and Transformers
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Abstract (arXiv)
Reinforcement learning (RL) over text representations can be effective for finding high-value policies that can search over graphs. However, RL requires careful structuring of the search space and algorithm design to be effective in this challenge. Through extensive experiments, we explore how different design choices for text grammar and algorithmic choices for training can affect an RL policy's ability to generate molecules with desired properties. We arrive at a new RL-based molecular design algorithm (ChemRLformer) and perform a thorough analysis using 25 molecule design tasks, including computationally complex protein docking simulations. From this analysis, we discover unique insights in this problem space and show that ChemRLformer achieves state-of-the-art performance while being more straightforward than prior work by demystifying which design choices are actually helpful for text-based molecule design.
Key facts. Cited by 18 papers in the map (data through 14 Oct 2026). Builds on 53 of its 82 references that are in the map. First posted on arXiv 4 Oct 2023.
Builds on
53 of 82 references.
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- 2024NPGPT: Natural Product-Like Compound Generation with GPT-based Chemical Language Modelscited by 2
- 2024FREED++: Improving RL Agents for Fragment-Based Molecule Generation by Thorough Reproductioncited by 1
- 2026MolLIBRA: Genetic Molecular Optimization with Multi-Fingerprint Surrogates and Text-Molecule Aligned Criticcited by 0
- 2026C-MORAL: Controllable Multi-Objective Molecular Optimization with Reinforcement Alignment for LLMscited by 0
- 2026C-MORAL: Controllable Multi-Objective Molecular Optimization with Reinforcement Alignment for LLMs24 Apr 2026
- 2026MolLIBRA: Genetic Molecular Optimization with Multi-Fingerprint Surrogates and Text-Molecule Aligned Critic29 Jan 2026
- 2025CrystalGym: A New Benchmark for Materials Discovery Using Reinforcement Learning27 Sep 2025
- 2025Regulatory DNA sequence Design with Reinforcement Learning11 Mar 2025
- 2024NPGPT: Natural Product-Like Compound Generation with GPT-based Chemical Language Models19 Nov 2024
- 2024Can LLMs Generate Diverse Molecules? Towards Alignment with Structural Diversity4 Oct 2024
- 2024Any-Property-Conditional Molecule Generation with Self-Criticism using Spanning Trees12 Jul 2024
- 2024Less can be more for predicting properties with large language models25 Jun 2024
- 2024FREED++: Improving RL Agents for Fragment-Based Molecule Generation by Thorough Reproduction18 Jan 2024
- 2023AGaLiTe: Approximate Gated Linear Transformers for Online Reinforcement Learning24 Oct 2023