New LevelHead: deskew before you classify Project page

Research

Research on agents, reinforcement learning, and large language models.

LevelHead: Deskew Before You Classify

To be submitted · CVPR 2027

A training-free method for page deskewing and orientation classification. LevelHead levels the page with a spectral deskewer first, then lets any frozen classifier or VLM vote over the four quarter turns of the level page. On pages at any angle it lifts four Qwen3-VL models from 41.9% to 84.6% and four orientation classifiers from 71.9% to 85.2%.

Post-Audit Mirage: Identifiability Limits of Offline Agent Verification

Aman Behera, Payal Payal

Accepted · Who Verifies the Agents? Workshop at NeurIPS 2026 (Poster)

A matched-world benchmark for offline agent verification. A safe and a harmful deployment can leave byte-identical audit records while needing opposite decisions, so no offline verifier can tell them apart. Across authorization, scheduling, and shared-capacity environments, the paper shows when fresh post-update evidence restores the decision, and gives a fail-closed monitor that deploys, holds, asks for more evidence, or reports unsupported.

Accuracy by evidence position for Pythia 2.8B, Mamba 2.8B, and Mamba-2 2.7B

Mixing Matters? Position Bias Across Sequence Mixers

Aman Behera, Namit Solanki, Mehul Anand

Accepted · PriGM Workshop at NeurIPS 2026, Paris

A paired study of position bias across Transformer, Mamba, and hybrid language models. One answer-bearing passage moves through ten positions of a fixed long context while everything else stays the same. Pythia favours the opening and the Mamba checkpoints do not; the paper reports this as a model-family difference, not an isolated architecture effect.

RDAN-GRPO response-level advantage computation diagram

RDAN-GRPO

Reinforcement learning

Rubric Decoupled Advantage Normalisation GRPO is a rubric-based reinforcement learning repository for aligning LLMs with complex, open-domain instruction-following tasks. It improves performance on public instruction-following benchmarks.

MycoGate-VL example: the claimed count of eight lights is annotated as a hallucinated span with miscounting and invention labels

MycoGate-VL

Accepted · SHROOM-Visions at EMNLP 2026

Detects and categorizes hallucinated character spans in vision-language responses across English, French, Italian, and Chinese. Combines multilingual detectors, a learned clean-document gate, visual category supervision, and scorer-aware output serialization.