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SOLAR: A Self-Optimizing Open-Ended Autonomous Agent for Lifelong Learning and Continual Adaptation

Summary

Large language models struggle with concept drift and costly gradient-based adaptation in dynamic real-world settings. This paper introduces SOLAR, a self-optimizing lifelong autonomous agent that uses parameter-level meta-learning and multi-level reinforcement learning to adapt continuously without manual curation. SOLAR maintains an evolving knowledge base that balances plasticity and stability, outperforming strong baselines on commonsense, mathematical, medical, coding, social, and logical reasoning tasks, marking a significant step toward lifelong adaptive agents.

SourcearXiv AIAuthor: Nitin Vetcha, Dianbo Liu
SOLAR: A Self-Optimizing Open-Ended Autonomous Agent for Lifelong Learning and Continual Adaptation
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[2605.20189] SOLAR: A Self-Optimizing Open-Ended Autonomous Agent for Lifelong Learning and Continual Adaptation

[Submitted on 23 Mar 2026]

Title:SOLAR: A Self-Optimizing Open-Ended Autonomous Agent for Lifelong Learning and Continual Adaptation

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Abstract:Despite the remarkable success of large language models (LLMs), they still face bottlenecks while deploying in dynamic, real-world settings with primary challenges being concept drift and the high cost of gradient-based adaptation. Traditional fine-tuning (FT) struggles to adapt to non-stationary data streams without resulting in catastrophic for getting or requiring extensive manual data curation. To address these limitations within the streaming and continual learning paradigm, we propose the Self-Optimizing Lifelong Autonomous Reasoner (SOLAR) which is an open-ended autonomous agent that leverages parameter-level meta-learning to self-improve, treating model weights as an environment for exploration. It initiates the process by consolidating a strong prior over common-sense knowledge making it effective for transfer-learning. By utilizing a multi-level reinforcement learning approach, SOLAR autonomously discovers adaptation strategies, enabling efficient test-time adaptation to unseen domains. Crucially, SOLAR maintains an evolving knowledge base of valid modification strategies, implicitly acting as an episodic memory buffer to balance plasticity (adaptation to new tasks) and stability (retention of meta-knowledge). Experiments demonstrate that SOLAR outperforms strong baselines on common-sense, mathematical, medical, coding, social and logical reasoning tasks, marking a significant step toward autonomous agents capable of lifelong adaptation in evolving environments.

Comments: Accepted at "Association for the Advancement of Artificial Intelligence 2026 Conference" in Streaming Continual Learning Bridge. Published in CEUR Workshop Proceedings (Original version at this https URL)

Subjects:

Artificial Intelligence (cs.AI); Machine Learning (cs.LG)

Cite as: arXiv:2605.20189 [cs.AI]

(or arXiv:2605.20189v1 [cs.AI] for this version)

https://doi.org/10.48550/arXiv.2605.20189

arXiv-issued DOI via DataCite

Journal reference: CEUR Workshop Proceedings, Vol. 4183, 2026

Submission history

From: Nitin Vetcha [view email] [v1] Mon, 23 Mar 2026 07:18:02 UTC (20,314 KB)

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Key points and analysis

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Key points

  • SOLAR leverages parameter-level meta-learning to treat model weights as an environment for exploration and self-improvement.
  • Multi-level reinforcement learning enables autonomous discovery of adaptation strategies for test-time adaptation to unseen domains.
  • An evolving knowledge base acts as episodic memory buffer to balance plasticity and stability.
  • Outperforms traditional fine-tuning on multiple reasoning tasks without catastrophic forgetting.

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