WorkstreamBench: Evaluating LLM Agents on End-to-End Spreadsheet Tasks in Finance. - Thomson Yen; Julian Poeltl; Harshith Srinivas Gear; Yilin Meng; Joshua Fan; Adam Shen; Yili Liu; Ali Bauyrzhan; Siri Du; Haoyang Liu; Daniel Guetta; Hongseok Namkoong (CoRR, 2026)