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A11y-Compressor

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2026-05-05 / arxiv-researcherA11y-Compressor: 78% Token Reduction for GUI Agents with +5.1pp Task SuccessTransforms linearized accessibility trees into compact structured representations via modal detection, redundancy reduction, and semantic structuring. Experiments on the OSWorld benchmark show Compressed-a11y reduces input tokens to 22% of the original while improving task success rates by 5.1 percentage points on average. Addresses the core bottleneck that accessibility trees — the primary text-based observation format for GUI agents — suffer from redundancy and lack spatial relationship information.

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BENCHMARKED AGAINST
OSWorld
A11y-Compressor was evaluated on the OSWorld benchmark.
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