On The Landscape of Spoken Language Models: A Comprehensive Survey
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Abstract (arXiv)
The field of spoken language processing is undergoing a shift from training custom-built, task-specific models toward using and optimizing spoken language models (SLMs) which act as universal speech processing systems. This trend is similar to the progression toward universal language models that has taken place in the field of (text) natural language processing. SLMs include both "pure" language models of speech -- models of the distribution of tokenized speech sequences -- and models that combine speech encoders with text language models, often including both spoken and written input or output. Work in this area is very diverse, with a range of terminology and evaluation settings. This paper aims to contribute an improved understanding of SLMs via a unifying literature survey of recent work in the context of the evolution of the field. Our survey categorizes the work in this area by model architecture, training, and evaluation choices, and describes some key challenges and directions for future work.
Key facts. Cited by 116 papers in the map (data through 7 Oct 2026). Builds on 180 of its 225 references that are in the map. First posted on arXiv 11 Apr 2025.
Builds on
180 of 225 references.
References · 180
- 2018BERT: Pre-training of Deep Bidirectional Transformers for Language Understandingcited by 40,204
- 2020Language Models are Few-Shot Learnerscited by 32,199
- 2023GPT-4 Technical Reportcited by 18,132
- 2022Training language models to follow instructions with human feedbackcited by 15,712
- 2024The Llama 3 Herd of Modelscited by 14,192
- 2023LLaMA: Open and Efficient Foundation Language Modelscited by 13,958
- 2023Llama 2: Open Foundation and Fine-Tuned Chat Modelscited by 12,865
- 2022Chain-of-Thought Prompting Elicits Reasoning in Large Language Modelscited by 12,302
- 2023Judging LLM-as-a-Judge with MT-Bench and Chatbot Arenacited by 8,393
- 2023Direct Preference Optimization: Your Language Model is Secretly a Reward Modelcited by 7,916
- 2023BLIP-2: Bootstrapping Language-Image Pre-training with Frozen Image Encoders and Large Language Modelscited by 6,069
- 2016Overcoming catastrophic forgetting in neural networkscited by 4,718
38 more
- 2017Neural Discrete Representation Learningcited by 4,650
- 2019Parameter-Efficient Transfer Learning for NLPcited by 4,195
- 2019HellaSwag: Can a Machine Really Finish Your Sentence?cited by 4,018
- 2022Robust Speech Recognition via Large-Scale Weak Supervisioncited by 3,972
- 2020wav2vec 2.0: A Framework for Self-Supervised Learning of Speech Representationscited by 3,853
- 2021Finetuned Language Models Are Zero-Shot Learnerscited by 3,747
- 2022OPT: Open Pre-trained Transformer Language Modelscited by 3,464
- 2023Qwen Technical Reportcited by 3,273
- 2023SWE-bench: Can Language Models Resolve Real-World GitHub Issues?cited by 3,193
- 2024Gemini 1.5: Unlocking multimodal understanding across millions of tokens of contextcited by 3,175
- 2017TriviaQA: A Large Scale Distantly Supervised Challenge Dataset for Reading Comprehensioncited by 2,895
- 2019The Curious Case of Neural Text Degenerationcited by 2,881
- 2021Efficiently Modeling Long Sequences with Structured State Spacescited by 2,424
- 2021HuBERT: Self-Supervised Speech Representation Learning by Masked Prediction of Hidden Unitscited by 2,301
- 2021Pre-train, Prompt, and Predict: A Systematic Survey of Prompting Methods in Natural Language Processingcited by 2,222
- 2022Beyond the Imitation Game: Quantifying and extrapolating the capabilities of language modelscited by 1,970
- 2021WavLM: Large-Scale Self-Supervised Pre-Training for Full Stack Speech Processingcited by 1,609
- 2020HiFi-GAN: Generative Adversarial Networks for Efficient and High Fidelity Speech Synthesiscited by 1,139
- 2022MaskGIT: Masked Generative Image Transformercited by 1,082
- 2017Natural TTS Synthesis by Conditioning WaveNet on Mel Spectrogram Predictionscited by 800
- 2021SoundStream: An End-to-End Neural Audio Codeccited by 756
- 2023Neural Codec Language Models are Zero-Shot Text to Speech Synthesizerscited by 737
- 2022Autoregressive Image Generation using Residual Quantizationcited by 706
- 2022High Fidelity Neural Audio Compressioncited by 673
- 2022AudioLM: a Language Modeling Approach to Audio Generationcited by 611
- 2023Qwen-Audio: Advancing Universal Audio Understanding via Unified Large-Scale Audio-Language Modelscited by 591
- 2019BLiMP: The Benchmark of Linguistic Minimal Pairs for Englishcited by 553
- 2024Qwen2-Audio Technical Reportcited by 543
- 2024Moshi: a speech-text foundation model for real-time dialoguecited by 536
- 2023SpeechGPT: Empowering Large Language Models with Intrinsic Cross-Modal Conversational Abilitiescited by 518
- 2023SALMONN: Towards Generic Hearing Abilities for Large Language Modelscited by 492
- 2025Phi-4-Mini Technical Report: Compact yet Powerful Multimodal Language Models via Mixture-of-LoRAscited by 491
- 2023Simple and Controllable Music Generationcited by 480
- 2023MusicLM: Generating Music From Textcited by 442
- 2016A Corpus and Evaluation Framework for Deeper Understanding of Commonsense Storiescited by 413
- 2023Voicebox: Text-Guided Multilingual Universal Speech Generation at Scalecited by 373
- 2021Generative Spoken Language Modeling from Raw Audiocited by 336
- 2024CosyVoice: A Scalable Multilingual Zero-shot Text-to-speech Synthesizer based on Supervised Semantic Tokenscited by 323
50 most cited of 180 All 180 (JSON)
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Citing papers per year: 2025: 49; 2026: 67.
116 papers.
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- 2025MMSU: A Massive Multi-task Spoken Language Understanding and Reasoning Benchmarkcited by 101
- 2025DeSTA2.5-Audio: Toward General-Purpose Large Audio Language Model with Self-Generated Cross-Modal Alignmentcited by 47
- 2025Towards Holistic Evaluation of Large Audio-Language Models: A Comprehensive Surveycited by 38
- 2025STITCH: Simultaneous Thinking and Talking with Chunked Reasoning for Spoken Language Modelscited by 25
- 2025Reducing Object Hallucination in Large Audio-Language Models via Audio-Aware Decodingcited by 22
- 2025Audio-Aware Large Language Models as Judges for Speaking Stylescited by 17
- 2025Closing the Gap Between Text and Speech Understanding in LLMscited by 14
- 2025Game-Time: Evaluating Temporal Dynamics in Spoken Language Modelscited by 13
- 2025Stream RAG: Instant and Accurate Spoken Dialogue Systems with Streaming Tool Usagecited by 12
- 2025Analyzing Mitigation Strategies for Catastrophic Forgetting in End-to-End Training of Spoken Language Modelscited by 11
- 2026GaP: A Graph-as-Policy Multi-Agent Self-Learning Harness For Variational Automation Taskscited by 11
- 2025VStyle: A Benchmark for Voice Style Adaptation with Spoken Instructionscited by 9
38 more
- 2025From Turn-Taking to Synchronous Dialogue: A Survey of Full-Duplex Spoken Language Modelscited by 9
- 2026Multi-Faceted Interactivity Alignment in Full-Duplex Speech Modelscited by 9
- 2026AQAScore: Evaluating Semantic Alignment in Text-to-Audio Generation via Audio Question Answeringcited by 8
- 2025In-Context Learning Boosts Speech Recognition via Human-like Adaptation to Speakers and Language Varietiescited by 7
- 2025From Alignment to Advancement: Bootstrapping Audio-Language Alignment with Synthetic Datacited by 7
- 2025Low-Resource Domain Adaptation for Speech LLMs via Text-Only Fine-Tuningcited by 7
- 2025VocalBench-DF: A Benchmark for Evaluating Speech LLM Robustness to Disfluencycited by 7
- 2025StressTest: Can YOUR Speech LM Handle the Stress?cited by 6
- 2025SpidR: Learning Fast and Stable Linguistic Units for Spoken Language Models Without Supervisioncited by 6
- 2026AQUA-Bench: Beyond Finding Answers to Knowing When There Are None in Audio Question Answeringcited by 6
- 2025Flow-SLM: Joint Learning of Linguistic and Acoustic Information for Spoken Language Modelingcited by 5
- 2025Evaluating Emotion Recognition in Spoken Language Models on Emotionally Incongruent Speechcited by 5
- 2026Optimizing Conversational Quality in Spoken Dialogue Systems with Reinforcement Learning from AI Feedbackcited by 5
- 2026ZeroSyl: Simple Zero-Resource Syllable Tokenization for Spoken Language Modelingcited by 5
- 2026All That Glitters Is Not Audio: Rethinking Text Priors and Audio Reliance in Audio-Language Evaluationcited by 5
- 2025Robust and Efficient Autoregressive Speech Synthesis with Dynamic Chunk-wise Prediction Policycited by 4
- 2025Speech Discrete Tokens or Continuous Features? A Comparative Analysis for Spoken Language Understanding in SpeechLLMscited by 4
- 2025Advancing Speech Understanding in Speech-Aware Language Models with GRPOcited by 4
- 2025When Silence Matters: The Impact of Irrelevant Audio on Text Reasoning in Large Audio-Language Modelscited by 4
- 2025Chain-of-Thought Reasoning in Streaming Full-Duplex End-to-End Spoken Dialogue Systemscited by 4
- 2026PRiSM: Benchmarking Phone Realization in Speech Modelscited by 4
- 2026Walking Through Uncertainty: An Empirical Study of Uncertainty Estimation for Audio-Aware Large Language Modelscited by 4
- 2026Raon-Speech Technical Reportcited by 4
- 2025ALAS: An Automatic Latent Alignment Score for Audio Language Modelscited by 3
- 2025AHAMask: Reliable Task Specification for Large Audio Language Models without Instructionscited by 3
- 2025CantoASR: Prosody-Aware ASR-LALM Collaboration for Low-Resource Cantonesecited by 3
- 2026VoxServe: Streaming-Centric Serving System for Speech Language Modelscited by 3
- 2026ASPIRin: Action Space Projection for Interactivity-Optimized Reinforcement Learning in Full-Duplex Speech Language Modelscited by 3
- 2026Hierarchical Acoustic-Semantic Modeling: Modality Separation and Semantic Coherence for Full-Duplex SLMscited by 3
- 2025An Exploration of Mamba for Speech Self-Supervised Modelscited by 2
- 2025TELEVAL: A Benchmark Designed for Spoken Language Models in Chinese Interactive Scenarioscited by 2
- 2025GOAT-SLM: A Spoken Language Model with Paralinguistic and Speaker Characteristic Awarenesscited by 2
- 2025Optimal Transport Regularization for Speech Text Alignment in Spoken Language Modelscited by 2
- 2025Conversational Speech Reveals Structural Robustness Failures in SpeechLLM Backbonescited by 2
- 2025Transcribe, Translate, or Transliterate: An Investigation of Intermediate Representations in Spoken Language Modelscited by 2
- 2025Towards Unsupervised Speech Recognition at the Syllable-Levelcited by 2
- 2025Data-Centric Lessons To Improve Speech-Language Pretrainingcited by 2
- 2025AzeroS: Extending LLM to Speech with Self-Generated Instruction-Free Tuningcited by 2
50 most cited of 116 All 116 (JSON)
- 2026Controlling Speaking Rate in Autoregressive TTS via Activation Steering27 Sep 2026
- 2026Turning Speech Language Models into Multilingual Listeners27 Sep 2026
- 2026The Spoken Wikipedia Presentation Corpus18 Sep 2026
- 2026Quantifying the Generation Modality Gap in Speech-Text Language Models13 Sep 2026
- 2026MP-Bench: Evaluating Voice Agents as a Multiparty Conversation Participant11 Sep 2026
- 2026Kraken: LLM-based Speech-to-Speech Translation via Low-bitrate VQ and Dual-path Source Conditioning11 Sep 2026
- 2026Do Spoken Language Models Hear Speech as They Read Text? Bridging Structural Gaps Between Speech and Text24 Aug 2026
- 2026Measuring Fairness in Large Audio Language Models via Semantic-Aware Bias Estimation13 Aug 2026
- 2026Safeguards for Speech2Speech LLM-Assistants: A Case Study in Automotive Applications23 Jul 2026
- 2026A Cross Community Agenda for Speech AI22 Jul 2026
- 2026Improving Text-to-Audio Instruction Following via Fine-Grained Feedback from Audio-Aware Large Language Models15 Jul 2026
- 2026The Sound of Absence: Audio-Language Embedding Models Struggle with Negation14 Jul 2026
38 more
- 2026Efficiently Adapting Spoken Language Models for the Singaporean Context11 Jul 2026
- 2026Hierarchical Acoustic-Semantic Modeling: Modality Separation and Semantic Coherence for Full-Duplex SLMs7 Jul 2026
- 2026GaP: A Graph-as-Policy Multi-Agent Self-Learning Harness For Variational Automation Tasks6 Jul 2026
- 2026Interleaved Speech Language Models Latently Work In Text21 Jun 2026
- 2026Integrating Facial Generation into Full-Duplex Spoken Dialogue Systems20 Jun 2026
- 2026Overcoming State Inertia in Full-Duplex Spoken Language Models via Activation Steering9 Jun 2026
- 2026Multi-Faceted Interactivity Alignment in Full-Duplex Speech Models9 Jun 2026
- 2026Revisiting Lexicon Evaluation in Unsupervised Word Discovery4 Jun 2026
- 2026PolySpeech-100: A Large-Scale Benchmark for Speech Understanding Across 100+ Languages and Dialects31 May 2026
- 2026LEAF: Growing Trees Without Branching for Speech-Aware Large Language Model Post-Training29 May 2026
- 2026A Unified and Reproducible Experimentation Framework for Speech Understanding29 May 2026
- 2026MELD: Mel-Spectrogram-Based Speech Language Modeling with Discrete Latent Variables28 May 2026
- 2026When Helpful Context Leaks: Privacy Risks in Domain-Adapted ASR27 May 2026
- 2026Not-So-Strange Love: Language Models and Generative Linguistic Theories are More Compatible than They Appear11 May 2026
- 2026TraceAV-Bench: Benchmarking Multi-Hop Trajectory Reasoning over Long Audio-Visual Videos8 May 2026
- 2026Walking Through Uncertainty: An Empirical Study of Uncertainty Estimation for Audio-Aware Large Language Models28 Apr 2026
- 2026Scaling Properties of Continuous Diffusion Spoken Language Models27 Apr 2026
- 2026All That Glitters Is Not Audio: Rethinking Text Priors and Audio Reliance in Audio-Language Evaluation27 Apr 2026
- 2026MoVE: Translating Laughter and Tears via Mixture of Vocalization Experts in Speech-to-Speech Translation19 Apr 2026
- 2026VIBE: Voice-Induced open-ended Bias Evaluation for Large Audio-Language Models via Real-World Speech19 Apr 2026
- 2026Aligning Backchannel and Dialogue Context Representations via Contrastive LLM Fine-Tuning17 Apr 2026
- 2026ASPIRin: Action Space Projection for Interactivity-Optimized Reinforcement Learning in Full-Duplex Speech Language Models11 Apr 2026
- 2026You Can't Fight in Here! This is BBS!10 Apr 2026
- 2026Across the Levels of Analysis: Explaining Predictive Processing in Humans Requires More Than Machine-Estimated Probabilities10 Apr 2026
- 2026TASU2: Controllable CTC Simulation for Alignment and Low-Resource Adaptation of Speech LLMs9 Apr 2026
- 2026Raon-Speech Technical Report8 Apr 2026
- 2026Adapting Text LLMs to Speech via Multimodal Depth Up-Scaling1 Apr 2026
- 2026Who Spoke What When? Evaluating Spoken Language Models for Conversational ASR with Semantic and Overlap-Aware Metrics24 Mar 2026
- 2026TiCo: Time-Controllable Spoken Dialogue Model23 Mar 2026
- 2026How Auditory Knowledge in LLM Backbones Shapes Audio Language Models: A Holistic Evaluation19 Mar 2026
- 2026On Optimizing Multimodal Jailbreaks for Spoken Language Models19 Mar 2026
- 2026Aligning Paralinguistic Understanding and Generation in Speech LLMs via Multi-Task Reinforcement Learning16 Mar 2026
- 2026The Voice Behind the Words: Quantifying Intersectional Bias in SpeechLLMs15 Mar 2026
- 2026Nudging Hidden States: Training-Free Model Steering for Chain-of-Thought Reasoning in Large Audio-Language Models15 Mar 2026
- 2026Speaker Verification with Speech-Aware LLMs: Evaluation and Augmentation11 Mar 2026
- 2026Do What I Say: A Spoken Prompt Dataset for Instruction-Following10 Mar 2026
- 2026SPAR-K: Scheduled Periodic Alternating Early Exit for Spoken Language Models10 Mar 2026
- 2026StyleBench: Evaluating Speech Language Models on Conversational Speaking Style Control8 Mar 2026
50 newest of 116 All 116 (JSON)
- 2025MMSU: A Massive Multi-task Spoken Language Understanding and Reasoning Benchmarkcited by 101
- 2025STITCH: Simultaneous Thinking and Talking with Chunked Reasoning for Spoken Language Modelscited by 25
- 2026All That Glitters Is Not Audio: Rethinking Text Priors and Audio Reliance in Audio-Language Evaluationcited by 5
- 2025Advancing Speech Understanding in Speech-Aware Language Models with GRPOcited by 4
- 2025When Silence Matters: The Impact of Irrelevant Audio on Text Reasoning in Large Audio-Language Modelscited by 4
- 2025Chain-of-Thought Reasoning in Streaming Full-Duplex End-to-End Spoken Dialogue Systemscited by 4
- 2025Investigating Faithfulness in Large Audio Language Modelscited by 1
- 2026Nudging Hidden States: Training-Free Model Steering for Chain-of-Thought Reasoning in Large Audio-Language Modelscited by 1
- 2026LEAF: Growing Trees Without Branching for Speech-Aware Large Language Model Post-Trainingcited by 0
- 2026Efficiently Adapting Spoken Language Models for the Singaporean Contextcited by 0
- 2026Efficiently Adapting Spoken Language Models for the Singaporean Context11 Jul 2026
- 2026LEAF: Growing Trees Without Branching for Speech-Aware Large Language Model Post-Training29 May 2026
- 2026All That Glitters Is Not Audio: Rethinking Text Priors and Audio Reliance in Audio-Language Evaluation27 Apr 2026
- 2026Nudging Hidden States: Training-Free Model Steering for Chain-of-Thought Reasoning in Large Audio-Language Models15 Mar 2026
- 2025Chain-of-Thought Reasoning in Streaming Full-Duplex End-to-End Spoken Dialogue Systems2 Oct 2025
- 2025When Silence Matters: The Impact of Irrelevant Audio on Text Reasoning in Large Audio-Language Models1 Oct 2025
- 2025Investigating Faithfulness in Large Audio Language Models26 Sep 2025
- 2025Advancing Speech Understanding in Speech-Aware Language Models with GRPO21 Sep 2025
- 2025STITCH: Simultaneous Thinking and Talking with Chunked Reasoning for Spoken Language Models21 Jul 2025
- 2025MMSU: A Massive Multi-task Spoken Language Understanding and Reasoning Benchmark5 Jun 2025
- 2025DeSTA2.5-Audio: Toward General-Purpose Large Audio Language Model with Self-Generated Cross-Modal Alignmentcited by 47
- 2025From Alignment to Advancement: Bootstrapping Audio-Language Alignment with Synthetic Datacited by 7
- 2025AzeroS: Extending LLM to Speech with Self-Generated Instruction-Free Tuningcited by 2
- 2025AzeroS: Extending LLM to Speech with Self-Generated Instruction-Free Tuning31 Dec 2025
- 2025DeSTA2.5-Audio: Toward General-Purpose Large Audio Language Model with Self-Generated Cross-Modal Alignment3 Jul 2025
- 2025From Alignment to Advancement: Bootstrapping Audio-Language Alignment with Synthetic Data26 May 2025
- 2025An Exploration of Mamba for Speech Self-Supervised Models14 Jun 2025
- 2025Towards Holistic Evaluation of Large Audio-Language Models: A Comprehensive Surveycited by 38
- 2025Reducing Object Hallucination in Large Audio-Language Models via Audio-Aware Decodingcited by 22
- 2025Audio-Aware Large Language Models as Judges for Speaking Stylescited by 17
- 2025Closing the Gap Between Text and Speech Understanding in LLMscited by 14
- 2025Game-Time: Evaluating Temporal Dynamics in Spoken Language Modelscited by 13
- 2025Analyzing Mitigation Strategies for Catastrophic Forgetting in End-to-End Training of Spoken Language Modelscited by 11
- 2025VStyle: A Benchmark for Voice Style Adaptation with Spoken Instructionscited by 9
- 2025From Turn-Taking to Synchronous Dialogue: A Survey of Full-Duplex Spoken Language Modelscited by 9
- 2026Multi-Faceted Interactivity Alignment in Full-Duplex Speech Modelscited by 9
- 2026AQAScore: Evaluating Semantic Alignment in Text-to-Audio Generation via Audio Question Answeringcited by 8
- 2025In-Context Learning Boosts Speech Recognition via Human-like Adaptation to Speakers and Language Varietiescited by 7
- 2025Low-Resource Domain Adaptation for Speech LLMs via Text-Only Fine-Tuningcited by 7
12 most cited of 94 All 94 (JSON)
- 2026Controlling Speaking Rate in Autoregressive TTS via Activation Steering27 Sep 2026
- 2026Turning Speech Language Models into Multilingual Listeners27 Sep 2026
- 2026The Spoken Wikipedia Presentation Corpus18 Sep 2026
- 2026Quantifying the Generation Modality Gap in Speech-Text Language Models13 Sep 2026
- 2026MP-Bench: Evaluating Voice Agents as a Multiparty Conversation Participant11 Sep 2026
- 2026Kraken: LLM-based Speech-to-Speech Translation via Low-bitrate VQ and Dual-path Source Conditioning11 Sep 2026
- 2026Do Spoken Language Models Hear Speech as They Read Text? Bridging Structural Gaps Between Speech and Text24 Aug 2026
- 2026Measuring Fairness in Large Audio Language Models via Semantic-Aware Bias Estimation13 Aug 2026
- 2026A Cross Community Agenda for Speech AI22 Jul 2026
- 2026The Sound of Absence: Audio-Language Embedding Models Struggle with Negation14 Jul 2026
- 2026Hierarchical Acoustic-Semantic Modeling: Modality Separation and Semantic Coherence for Full-Duplex SLMs7 Jul 2026
- 2026Interleaved Speech Language Models Latently Work In Text21 Jun 2026
12 newest of 94 All 94 (JSON)