Challenge: Large Language Model (LLM) routing is a pivotal technique for navigating a diverse landscape of LLMs.
Approach: They propose a flexible and scalable multi-dimensional routing framework that models the capability and knowledge of models.
Outcome: The proposed framework can be used to generalize and identify top-performing models for group-level routing using modern benchmarks including MMLU-Pro, GPQA, BigGenBench, and LiveBench.

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LLMRouterBench: A Massive Benchmark and Unified Framework for LLM Routing (2026.findings-acl)

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Challenge: Large language model (LLM) routing assigns each query to the best suitable model from an ensemble.
Approach: They introduce a large-scale benchmark and unified framework for LLM routing . they find that many routing methods exhibit similar performance under unified evaluation .
Outcome: The proposed benchmark provides comprehensive metrics for both performance-oriented and performance-cost trade-off routing.
Enhancing LLM Capabilities Beyond Scaling Up (2024.emnlp-tutorials)

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Challenge: general-purpose large language models (LLMs) are expanding in scale and access to unpublic training data.
Approach: This tutorial aims to examine the capabilities of general-purpose large language models . authors discuss adaptation of LLMs to address conflicts, defense against attacks .
Outcome: This tutorial aims to examine the evolution of general-purpose large language models (LLMs) the authors argue that the evolution is dependent on the availability of training data and the scale of the models.
RouterEval: A Comprehensive Benchmark for Routing LLMs to Explore Model-level Scaling Up in LLMs (2025.findings-emnlp)

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Challenge: a lack of comprehensive benchmarks for Routing large language models has hindered the development of routers.
Approach: They propose a router-based benchmark to evaluate Routing large language models . the benchmark includes performance records for 12 popular LLM evaluations .
Outcome: The proposed model-level scaling up phenomenon can surpass the best single model in the pool and many existing strong LLMs.
Generalising LLM Routing using Past Performance Retrieval: A Few-Shot Router is Sufficient (2026.eacl-srw)

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Challenge: Large Language Models (LLMs) use a single LLM to perform tasks.
Approach: They propose a meta-evaluation framework that predicts per-model performance for new queries by retrieving similar past queries and reweighting model scores with lightweight attention.
Outcome: The proposed framework matches the quality–cost trade-offs of generalisable routers across five routing benchmarks.
How Predictable Are Large Language Model Capabilities? A Case Study on BIG-bench (2023.findings-emnlp)

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Challenge: a recent study shows that large language models can be used to predict performance on new configurations.
Approach: They investigate the predictability of large language model capabilities by using BIG-bench . they find a subset of BIG-Bench tasks as informative as BIG-bnch Hard .
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Injecting Domain-Specific Knowledge into Large Language Models: A Comprehensive Survey (2025.findings-emnlp)

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Challenge: specialized LLMs are often limited in domain-specific applications that require specialized knowledge.
Approach: They provide a comprehensive overview of four key methods to enhance large language models by integrating domain-specific knowledge.
Outcome: The proposed methods are categorized into four key approaches: dynamic knowledge injection, static knowledge embedding, modular adapters, and prompt optimization.
TensorOpera Router: A Multi-Model Router for Efficient LLM Inference (2024.emnlp-industry)

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Challenge: Large Language Models (LLMs) have demonstrated remarkable performance across a diverse set of domain-specific tasks.
Approach: They propose a non-monolithic LLM querying system that seamlessly integrates various LLM experts into a single query interface and dynamically routes incoming queries to the most high-performant expert based on query’s requirements.
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Adaptation of Large Language Models (2025.naacl-tutorial)

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Challenge: a tutorial on adaptation of large language models addresses the growing demand for models that go beyond static capabilities.
Approach: This tutorial will provide an overview of dynamic, domain-specific, and task-adaptive LLM adaptation techniques.
Outcome: This tutorial will outline dynamic, domain-specific, and task-adaptive LLM adaptation techniques.
A Survey on LLM-powered Agents for Recommender Systems (2025.findings-emnlp)

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Challenge: Large Language Models have demonstrated remarkable capabilities in natural language understanding, reasoning, and generation.
Approach: They present a comprehensive synthesis of large language models and their applications . they dissect a four-module agent architecture and review representative designs .
Outcome: The proposed models address fundamental challenges in traditional recommender systems . they include limited comprehension of complex user intents, insufficient interaction capabilities .
Fundamental Capabilities of Large Language Models and their Applications in Domain Scenarios: A Survey (2024.acl-long)

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Challenge: Existing benchmark-based evaluations cannot accurately reflect the performance of real-world applications.
Approach: They propose a reliable strategy for domains to choose more robust LLMs for real-world applications.
Outcome: The proposed strategy addresses the challenges faced by domains to choose more robust LLMs for real-world applications.

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