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Face-Human-Bench: A Comprehensive Benchmark of Face and Human Understanding for Multi-modal Assistants
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Introduces Face-Human-Bench, a 3,600-problem (dev + test, 1,800 each, EN/ZH) multiple-choice benchmark with a three-level taxonomy for face and human understanding, and evaluates 25 MLLMs on it along with CoT/hint effects, position sensitivity, and comparisons to specialist models.
Problem
Existing multimodal LLM benchmarks cover only a narrow set of face and human understanding abilities (e.g., celebrity recognition, action recognition), leaving many face- and human-centric abilities unevaluated and unclear whether MLLMs match specialist models.
Approach
A hierarchical ability taxonomy (2 L1 perspectives, 10 L2, 18 L3 abilities) is used to build multiple-choice problems semi-automatically from 16 public face/human datasets, with image transformations (crop, box-added, identity) and ChatGPT-assisted distractor generation, followed by manual review. The benchmark also introduces a relative position sensitivity score and a relative performance score
Key results
- Overall scores on Face-Human-Bench (EN) range from 27.9% to 76.4%; InternVL-Chat-v1.2-Plus is the top open-source model at 76.4%, while GPT-4o reaches 73.6% face-human overall... (reported overall 70.0% zero-shot for GPT-4o).
- Adding hint plus 1-stage task-specific CoT raises GPT-4o overall from 70.0% to 79.9%, while InternVL-Chat-v1.2-Plus stays flat (75.9-75.0%).
- InternLM-XComposer2-VL-7B has the lowest relative position sensitivity score of 3.7%.
Measured effects reported in the paper
| What was changed | Where | Measured | Effect |
|---|---|---|---|
| add hints (ablation) | GPT-4o · Face-Human-Bench overall | weighted accuracy: 70.0 -> 73.4 | Helped |
| add hints and vanilla CoT (ablation) | GPT-4o · Face-Human-Bench overall | weighted accuracy: 70.0 -> 78.6 | Helped |
| add hints and 1-stage task-specific CoT (ablation) | GPT-4o · Face-Human-Bench overall | weighted accuracy: 70.0 -> 79.9 | Helped |
| add hints and 2-stage task-specific CoT (ablation) | GPT-4o · Face-Human-Bench overall | weighted accuracy: 70.0 -> 79.1 | Helped |
| add hints (ablation) | InternVL-Chat-v1.2-Plus · Face-Human-Bench overall | weighted accuracy: 76.4 -> 75.9 | Hurt |
| add hints and vanilla CoT (ablation) | InternVL-Chat-v1.2-Plus · Face-Human-Bench overall | weighted accuracy: 76.4 -> 75.7 | Hurt |
| add hints and 1-stage task-specific CoT (ablation) | InternVL-Chat-v1.2-Plus · Face-Human-Bench overall | weighted accuracy: 76.4 -> 75.0 | Hurt |
| add hints and 2-stage task-specific CoT (ablation) | InternVL-Chat-v1.2-Plus · Face-Human-Bench overall | weighted accuracy: 76.4 -> 74.1 | Hurt |
| use the best MLLM instead of the early specialist model | MLLMs on FF++ deepfake detection · FF++ | ACC: 82.01 -> 56.21 | Hurt |
| use the best MLLM instead of the early specialist model | MLLMs on crowd counting · ShTech-A | MAE: 110.20 -> 1592.55 | Hurt |
| use the best MLLM instead of the early specialist model | MLLMs on cross-pose face recognition · CPLFW | ACC: 87.47 -> 67.98 | Hurt |
| use cropped rather than box-added images | MLLMs on human attribute recognition · human attribute recognition | accuracy | Helped |
Surprising findings
- Zero-shot GPT-4o does not surpass the best open-source model InternVL-Chat-v1.2-Plus, which the authors attribute to GPT-4o not realizing its potential without CoT.
- CoT and hints hurt or do not help the open-source InternVL-Chat-v1.2-Plus, which often stopped producing rationales.
Limitations
- Multiple-choice format only, which may not reflect open-ended use.
- Specialist comparisons rely on early specialist models and possible data distribution bias between MLLM training data and test datasets.
- Some tasks (e.g., 5 L3 abilities) lack specialist comparison experiments.
Experimental setup
Datasets: CelebA UTKFace RAF-DB FF++ SiW-Mv2 LFW CPLFW CALFW SLLFW MLFW WIDER Attribute HICO-DET
Benchmarks: Face-Human-Bench
Metrics: accuracy weighted accuracy Pearson correlation relative position sensitivity score relative performance score
Baselines: GPT-4o GPT-4V Gemini-1.5-Pro Claude-3.5-Sonnet InternVL-Chat-v1.5 LLaVA-NeXT-34B InternVL-Chat-v1.2-Plus early specialist models
Builds on: MMBench SEED-Bench Multi-modal CoT
Closest papers by meaning
- Human-MME: A Holistic Evaluation Benchmark for Human-Centric Multimodal Large Language Models (ICLR 2026 · similarity 0.87)
- FaceBench: A Multi-View Multi-Level Facial Attribute VQA Dataset for Benchmarking Face Perception MLLMs (CVPR 2025 · similarity 0.87)
- HumanSense: From Multimodal Perception to Empathetic Context-Aware Responses Through Reasoning MLLMs (AAAI 2026 · similarity 0.87)
- SoMi-ToM: Evaluating Multi-Perspective Theory of Mind in Embodied Social Interactions (NeurIPS 2025 · similarity 0.86)
- LifeEval: A Multimodal Benchmark for Assistive AI in Egocentric Daily Life Tasks (CVPR 2026 · similarity 0.86)
- ChatHuman: Chatting about 3D Humans with Tools (CVPR 2025 · similarity 0.86)
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