Challenge: Continual fine-tuning of large language models suffers from catastrophic forgetting . some approaches use routers to assign tasks to experts, but continual learning often requires retraining .
Approach: They propose a framework that integrates routing and response mechanisms within each expert . it eliminates the need for an additional router and allows each expert to decide whether a query should be handled .
Outcome: The proposed framework outperforms previous approaches in continual fine-tuning . it can handle learning tasks and out-of-distribution instances, paving the way for distributed model ensembling.

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Challenge: Recent work on large language models relies on intuition that most tasks can be described via natural language instructions.
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InsCL: A Data-efficient Continual Learning Paradigm for Fine-tuning Large Language Models with Instructions (2024.naacl-long)

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Challenge: In order to perform downstream tasks, Large Language Models (LLMs) need continual adaptation without catastrophic forgetting.
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LPC: A Logits and Parameter Calibration Framework for Continual Learning (2022.findings-emnlp)

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Challenge: Existing approaches to solve catastrophic forgetting problem are varied . current approaches to learn continuous learning are based on replay-based methods .
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Challenge: Large Language Models (LLMs) struggle with processing long contexts due to the limited context window.
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Towards Anytime Fine-tuning: Continually Pre-trained Language Models with Hypernetwork Prompts (2023.findings-emnlp)

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Challenge: Continual pre-training has been used for a multitude of domains and tasks . a continually pre-trained model can show a non-decreasing performance on unseen domains .
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MoExtend: Tuning New Experts for Modality and Task Extension (2024.acl-srw)

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Challenge: Existing instruction tuning methods for large language models (LLMs) are costly and difficult to implement.
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Recall and Learn: Fine-tuning Deep Pretrained Language Models with Less Forgetting (2020.emnlp-main)

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Challenge: Existing methods to fine-tune deep pretrained language models face catastrophic forgetting problems.
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Recurrent Knowledge Identification and Fusion for Language Model Continual Learning (2025.acl-long)

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Challenge: Continual learning (CL) is crucial for large language models without costly retraining.
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HFT: Half Fine-Tuning for Large Language Models (2025.acl-long)

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Challenge: Large language models (LLMs) with one or more fine-tuning phases can unlock various capabilities, but can be catastrophic forgetting during sequential training.
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Parameter-Efficient Finetuning for Robust Continual Multilingual Learning (2023.findings-acl)

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Challenge: Existing approaches to Continual Multilingual Learning (CML) are based on updating models using new data in stages.
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