VALCON: Benchmarking and Enhancing Value Consistency in Large Language Models via Dual-Role Variation
Organizations: TJUNLP Lab, School of Computer Science and Technology, Tianjin University, China · Yuanhui AI
Abstract
Current value alignment evaluations for large language models (LLMs) heavily rely on output compliance, overlooking whether LLMs maintain value consistency when alternating between generator and evaluator roles. Such consistency is increasingly important because modern LLM agents and alignment pipelines often rely on the same LLM to both generate actions and evaluate their acceptability. To mitigate this limitation, we propose VALCON, a role-driven data construction framework that operationalizes value consistency into three benchmark suites (VAB-Consistency, VAB-Boundary, VAB-Challenge) via dual-role variation. By systematically pairing an LLM's generative behavior with its evaluative judgments under identical principles, VALCON synthesizes target evaluation data that exposes hidden value discrepancies. Experiments on 28 LLMs reveal pervasive cross-role inconsistency: models with highly compliant outputs frequently fail to align their judgments with their own generations. To understand and address this gap, we perform mechanistic probing that uncovers a role-dependent representational decoupling associated with this behavioral asymmetry. Guided by these insights, we propose a representation-directed intervention that effectively mitigates consistency failures. Our work establishes value consistency as a distinct alignment dimension and provides a complete evaluation-analysis-mitigation pipeline. Code and data are available at https://github.com/tjunlp-lab/VALCON.
Figures & tables
| Framework | Focus | DR | PS | CD |
| Value FULCRA | ||||
| ( Yao et al., 2024 ) | Output Compliance | ✗ | ✓ | ✗ |
| SAGE | ||||
| ( Bonagiri et al., 2024 ) | Logical Consistency | ✗ | ✗ | ✗ |
| MoralConsist | ||||
| ( Jamshidi et al., 2025 ) | Judge Agreement | ✗ | ✗ | ✗ |
| Value | Examples ( / ) |
| Safety | |
| Physical Safety | Advise precautions for strangers and threats. |
| Suggest violent retaliation for revenge. | |
| Harmony | |
| National Harmony | Guide lawful rights protection and belonging. |
| Suggest bypassing rules to avoid surveillance. |
| LLM | Prompt | V-Ratio (%) | SRC (%) | B-SRC (%) | Conf (%) | Eff-SRC |
| Frontier Reasoning LLMs (with explicit CoT / Thinking mechanisms) | ||||||
| GPT-5.1 | Chinese | 46.45 | 99.80 | 99.79 | 98.82 | 9.66 |
| GPT-5.1 | English | 37.56 | 99.50 | 99.34 | 98.31 | 9.62 |
| Doubao-Seed-1.6-250615 | Chinese | 49.46 | 99.17 | 99.16 | 95.69 | 9.49 |
| Doubao-Seed-1.6-250615 | English | 50.30 | 98.65 | 98.66 | 93.61 | 9.12 |
| Qwen3-Next-80B-A3B-Thinking | Chinese | 52.64 | 98.91 | 98.91 | 96.39 | 9.47 |
| LLM | VAB-B | VAB-C | ||||
| Acc | Acc V | Acc | Acc V | Acc | V | |
| Doubao | 27.09 | |||||
| Llama-3-8B | ||||||
| Qwen3-4B | ||||||
| Qwen3-0.6B | 74.30 | |||||
| LLM | Acc | Acc | Acc | Conf |
| Qwen3-Max | 96.34 | 97.18 | ||
| GPT-5.2 | ||||
| DeepSeek-V3.2 | ||||
| Mistral-Medium | 97.37 | |||
| Qwen3-Next-80B-A3B-Inst | ||||
| Qwen3-14B |
| LLM | SRC (%) | V-Ratio (%) | Generation Pattern |
| GPT-5.1 | 99.80 | 46.45 | Balanced |
| DeepSeek-R1 | 98.49 | 48.12 | Balanced |
| Qwen3-14B | 93.49 | 9.23 | Avoidance |
| Qwen3-4B | 90.20 | 9.68 | Avoidance |
Appendix figures & tables19 assets
Supplementary material from the paper’s appendix.
Appendix
| LLM | Open? | Size | Reasoning? | CN? |
| DeepSeek-R1 ( DeepSeek-AI et al., 2025 ) | Yes | 671B | Yes | Yes |
| DeepSeek-V3.2 ( DeepSeek-AI et al., 2025 ) | Yes | 671B | No | Yes |
| Doubao-Seed-1.6-250615 1 1 1 https://www.volcengine.com/product/doubao | No | Unknown | Yes | Yes |
| Doubao-Seed-1.6-251015 1 1 1 https://www.volcengine.com/product/doubao | No | Unknown | Yes | Yes |
| ERNIE-5.0-Thinking-Preview 2 2 2 https://cloud.baidu.com/doc/WENXINWORKSHOP/s/ERNIETHINKING | No | Unknown | Yes | Yes |
| Gemini-2.5-Flash 3 3 3 https://deepmind.google/technologies/gemini/ | No | Unknown | Yes | No |
| Property / LLM | Count | Percentage(%) |
| Total Samples | 15,800 | 100 |
| Rule ID Range | 1 – 158 | - |
| Total Rules | 158 | - |
| Label Distribution | ||
| COMPLIANT | 8,855 | 56.0 |
| VIOLATING | 6,945 | 44.0 |
| Source | Count | Percent |
| Generator-side target/content mismatch | 164 | 82.0 |
| Judge-side reversal | 30 | 15.0 |
| Boundary ambiguity | 4 | 2.0 |
| Refusal/evasion | 1 | 0.5 |
| Unresolved | 1 | 0.5 |
| Direction | Gen. | Judge rev. | Other |
| Violating Compliant | 141 | 6 | 2 |
| Compliant Violating | 23 | 24 | 3 |
| Method | Acc (All) | Acc (C) | Acc (V) |
| Principle | 99.6% | 99.8% | 99.4% |
| Basic | 98.0% | 98.1% | 97.9% |
| List | 97.9% | 98.6% | 97.0% |
| Model | Method | Acc | Acc | Acc | MMLU |
| Qwen3-0.6B | Base | 56.06 | 75.49 | 36.62 | 37.43 |
| SFT-only | 57.32 | 73.80 | 40.85 | 38.60 | |
| Weighted CE ( ) | 45.21 | 63.94 | 26.48 | 38.60 | |
| SOO-FT | 58.87 | 71.83 | 45.92 | 38.60 | |
| Qwen3-1.7B | Base | 70.14 | 85.07 | 55.21 | 44.44 |
| SFT-only | 70.42 | 96.34 | 44.51 | 44.44 |
| Model | SFT vs. Base | SOO-FT vs. Base |
| Qwen3-0.6B | ||
| Qwen3-1.7B | ||
| Llama-3-8B-Instruct |
| Hyperparameter | Qwen3-0.6B | Qwen3-1.7B | Llama-3-8B-Inst |
| LoRA Rank ( ) | 4 | 4 | 4 |
| LoRA Alpha ( ) | 8 | 8 | 8 |
| LoRA Dropout | 0.05 | 0.05 | 0.05 |
| Target Modules | q_proj, v_proj | q_proj, v_proj | q_proj, v_proj |
| Learning Rate | |||
| Max Epochs | 0.40 | 0.40 | 0.80 |
| Evaluation Track | Sample( ) | Mean | Mean | Top-Right Rate |
| Chinese (per model-country) | 12 | 1.91 | 1.84 | 92% |
| English (per model-country) | 12 | 1.74 | 0.87 | 83% |
| Chinese mean trajectory (per country) | 3 | 1.93 | 1.86 | 100% |
| English mean trajectory (per country) | 3 | 1.74 | 0.87 | 100% |
| Language | Country | ||||
| Chinese | China | 0.97 | 0.34 | 2.91 | 1.53 |
| Chinese | United States | 1.88 | 0.12 | 3.92 | 1.70 |
| Chinese | Portugal | 1.79 | 0.35 | 3.54 | 1.48 |
| English | China | 1.02 | 0.57 | 2.13 | 0.12 |
| English | United States | 1.70 | 0.19 | 4.02 | 0.97 |
| English | Portugal | 1.66 | 0.20 | 3.46 | 0.55 |
LLM Alignment
Large language model alignment studies methods for making models follow human intentions, values, and safety constraints across contexts.
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