infrastructure
The Plant Model Beat the Generic Retriever
A live simulator answered causal wastewater questions nearly perfectly, while a small retriever transferred better between plants.
Summary
A live simulator answered causal wastewater questions nearly perfectly, while a small retriever transferred better between plants.
A frozen language model was grounded three ways in an interpretable wastewater simulator. The authors report 99.5 percent on 198 causal questions using a live simulator oracle, versus 79 percent for structured parameter injection and 75.8 percent for a 110-million-parameter retriever; after transfer to a different plant, that retriever reached 88 percent and was the only tested method to handle intervention questions. These are benchmark results on simulator-grounded questions, not instructions for operating a real treatment plant.
Why it matters
A live simulator answered causal wastewater questions nearly perfectly, while a small retriever transferred better between plants.
Limits and context
- The authors report 99.5 percent on 198 causal questions using a live simulator oracle, versus 79 percent for structured parameter injection and 75.8 percent for a 110-million-parameter retriever; after transfer to a different plant, that retriever reached 88 percent and was the only tested method to handle intervention questions.
- These are benchmark results on simulator-grounded questions, not instructions for operating a real treatment plant.
Key claims
A live simulator answered causal wastewater questions nearly perfectly, while a small retriever transferred better between plants.
Qualification: The authors report 99.5 percent on 198 causal questions using a live simulator oracle, versus 79 percent for structured parameter injection and 75.8 percent for a 110-million-parameter retriever; after transfer to a different plant, that retriever reached 88 percent and was the only tested method to handle intervention questions.
Evidence: source-2026-08-09-016
Sources
- arXiv preprint 2608.05151arXiv · primary research
Corrections
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