<p>BIM vs traditional cost estimating in AEC comes down to speed and how fast your numbers keep up when the design moves.</p> <p>With the old way, you export drawings, do manual takeoffs, and rebuild the estimate every time something changes. One revision means chasing scattered updates and redoing the count. That eats hours and leaves room for missed line items.</p> <p>BidLight works from the model itself. You export your Revit model and get labor, equipment, material, and time costs in minutes. When the design changes, the number updates in real time. No second takeoff.</p> <p>Here is the difference in practice:</p> <ol><li><strong>Source of truth.</strong> Traditional methods read 2D drawings. BidLight reads geometry and metadata straight from the model.</li><li><strong>Classification.</strong> Two AI models tag BOQ line items at 86% accuracy, so you spend less time sorting and more time checking.</li><li><strong>Pricing.</strong> It pulls current numbers from a database worth around $30,000, plus Craftsman, 1Build, and RSMeans, instead of stale rate sheets.</li><li><strong>Updates.</strong> A design change refreshes the estimate live, rather than triggering a manual redo.</li></ol> <p>The payoff is numbers you can defend in front of a client and bids you turn around faster. You can also bill early estimates as a service.</p> <p>Traditional takeoffs still work, and plenty of firms know them cold. The gap shows up at scale and on fast-moving projects, where manual recounts slow you down. BidLight keeps the estimate tied to the model so the math stays current as the work does.</p>