Right Answer, Wrong Reasons: GPT-OSS-120B Forecasts Costco Profits Within 4.4%
AI Engineer · youtube · 2026-11-09
Together AI's Hassan El Mghari and his father Omar, a former CFO and head of internal audit, test whether an open model can forecast profits. Given only Costco's pre-2024-fee-hike filings, GPT-OSS-120B writes the financial model as structured formulas and runs 16 cheap parallel attempts. The forecast lands within 4.4% of actuals—until an audit reveals two errors that happened to cancel out. Takeaway: for specialized agent work, put an expert in the loop and turn their checks into code.
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