Benchmark Weekly
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ISSUE 02 · 2026 / W34

Benchmark & Dataset
Weekly Digest

DATE RANGE2026.08.17 — 2026.08.23
SELECTED IN THIS ISSUE09 PICKS
BENCHMARK / DATASET07 / 02
01 / OVERVIEW

Selection overview

3Agent evaluations

Scientific, general-purpose and coding agents all move toward longer and more realistic workflows.

2State and safety

Memory goes beyond recall; safety expands from isolated attacks to the full harness lifecycle.

4Spatial, embodied, interpretability

High-fidelity data, physical validity and executable rules become central design choices.

ISSUE INSIGHT

Trend insight

Evaluation is moving from “was the final answer correct?” toward process-level verification: whether tasks reflect real demand, artifacts execute, state remains current and rules are actually followed.

Evaluation is becoming executable, stateful & real.
02 / TOP PICKS

Issue 02 selections

Ranked by research value, evaluation innovation and practical transferability

04
BenchmarkAgent Memory★★★★☆

StateMemBench

Measures whether agents know which facts are currently valid—not merely whether they remember prior information.

AUTHOR
Xinyi Fan et al.
INSTITUTION
University of Illinois Urbana-Champaign
PUBLISHED
2026.08.20
SCALE / DESIGN

234 multi-session scenarios across research collaboration, shopping and personal finance, in two dialogue-length regimes.

EVALUATION / METRICS

Closed-pool grading distinguishes current state, superseded state and unrelated errors to isolate state drift.

KEY RESULT

StateMem raises current-state accuracy on DeepSeek-V4-Flash from 0.205 to 0.363 and improves six memory/retrieval backends by 32–67 percentage points.

WHY IT MATTERS

Long-running agents often retrieve information successfully but act on values that are no longer valid.

DESIGN TAKEAWAYS

Current vs. Stale State, Supersession Tracking, Dependency Re-computation.

05
DatasetInterpretability★★★★☆

Discovers unexpected model behavior in real interactions and tests explanations through counterfactual prompt edits.

AUTHOR
Adam Karvonen et al.
INSTITUTION
Anthropic Fellows Program et al.
PUBLISHED
2026.08.17
SCALE / DESIGN

30 samples per prompt and 5–15 counterfactual experiments per investigation, followed by independent verification.

EVALUATION / METRICS

Predictors judge whether an edit changes behavior, using measured experimental outcomes as labels.

KEY RESULT

Three activation-reading interpretability tools show no clear uplift, while training on counterfactual experiments improves held-out and OOD generalization.

WHY IT MATTERS

It turns plausible explanations into predictions that experiments can support or falsify.

DESIGN TAKEAWAYS

Counterfactual Experiment, Behavior Discovery, Explanation Verification.

06
BenchmarkAgent Safety★★★★☆

HarnessRisk

Evaluates agent-harness risk across the full lifecycle, from configuration to incident recovery.

AUTHOR
Yajing Bai et al.
INSTITUTION
UNC Chapel Hill et al.
PUBLISHED
2026.08.18
SCALE / DESIGN

128 sandboxed cases across configuration, extension, runtime, persistence, action control and recovery.

EVALUATION / METRICS

Every trajectory is scored for Utility, Attack Success, Persistence and Detection.

KEY RESULT

Attack success ranges from 12.6% to 80.9% while utility remains between 75.0% and 97.6%.

WHY IT MATTERS

It shows that recognizing an attack and actually stopping it are different capabilities—and that safety belongs to the model–harness pair.

DESIGN TAKEAWAYS

Safety / Utility dual metrics, Lifecycle Coverage, Persistent-state Audit.

07
DatasetEmbodied AI★★★★☆

A large-scale, high-precision dataset for whole-body human motion and object interaction.

AUTHOR
Jiahao Ji et al.
INSTITUTION
National University of Singapore et al.
PUBLISHED
2026.08.17
SCALE / DESIGN

About 617.5 hours of high-precision motion, including roughly 245.7 hours of HOI, with synchronized object trajectories, meshes, text and metadata.

EVALUATION / METRICS

Measures motion-space diversity, interaction grounding, object consistency and Physical AI applications.

WHY IT MATTERS

It bridges the scale of internet video and the fidelity of laboratory motion capture.

DESIGN TAKEAWAYS

Frame-guided Coverage, High-fidelity Capture, Physical Consistency.

08
Benchmark3D Spatial★★★★☆

ReRef-3D

Places objects in 3D scenes according to spatial referring expressions and physical constraints.

AUTHOR
Mary Lynn Martin et al.
INSTITUTION
University of Colorado Boulder
PUBLISHED
2026.08.17
SCALE / DESIGN

33,826 instructions, 998 scenes and 16 placement families with direct, one-hop and two-hop references.

EVALUATION / METRICS

Predictions are inserted into the scene; relations are recomputed and checked alongside physical validity.

KEY RESULT

After fine-tuning, valid placement reaches about 68.3% for LLaVA-3D, 31.6% for 3D-LLM and 22.4% for PlaceIt3D.

WHY IT MATTERS

Ground truth is an acceptable region rather than a single coordinate, better reflecting real spatial tasks.

DESIGN TAKEAWAYS

Region-based Ground Truth, Relation Re-computation, Physical Validity.

09
BenchmarkMultimodal★★★★☆

Requires multimodal models to understand natural-language rules and plan compliant paths through visual mazes.

AUTHOR
Yu Chen et al.
INSTITUTION
Peking University et al.
PUBLISHED
2026.08.20
SCALE / DESIGN

Rule complexity and scene combinations are controllable, supporting systematic generation and unseen-rule tests.

EVALUATION / METRICS

Natural-language rules are translated into logic and executable validators that inspect the trajectory step by step.

KEY RESULT

Generated validators reach about 93.3% correctness before review; all final validators are human-verified.

WHY IT MATTERS

Separating perception, rule understanding and planning makes model failures easier to diagnose.

DESIGN TAKEAWAYS

Natural Language → Logic → Executable Validator, Disentangled Planning.